diff --git a/docs/quick-start/developers/vote-contract/index.md b/docs/quick-start/developers/vote-contract/index.md
index f9201719..f4e9de5a 100644
--- a/docs/quick-start/developers/vote-contract/index.md
+++ b/docs/quick-start/developers/vote-contract/index.md
@@ -21,13 +21,13 @@ import TabItem from '@theme/TabItem';
 <Tabs>
 <TabItem value="local" label="Local" default>
 
-* Basic knowledge of terminal commands
-* **IDE** - Install [VS Code](https://code.visualstudio.com/)
+- Basic knowledge of terminal commands
+- **IDE** - Install [VS Code](https://code.visualstudio.com/)
 
 **Install Required Packages**
 
-* [Install dotnet 6.0 SDK](https://dotnet.microsoft.com/en-us/download/dotnet/6.0)
-* Install aelf contract templates
+- [Install dotnet 6.0 SDK](https://dotnet.microsoft.com/en-us/download/dotnet/6.0)
+- Install aelf contract templates
 
 ```bash title="Terminal"
 dotnet new --install AElf.ContractTemplates
@@ -35,7 +35,7 @@ dotnet new --install AElf.ContractTemplates
 
 AELF.ContractTemplates contains various predefined templates for the ease of developing smart contracts on the aelf blockchain.
 
-* Install aelf deploy tool
+- Install aelf deploy tool
 
 ```bash title="Terminal"
 dotnet tool install --global aelf.deploy
@@ -70,7 +70,7 @@ Provide required permissions while installing aelf-command globally.
 
 **Install Git**
 
-* [Install Git](https://git-scm.com/downloads)
+- [Install Git](https://git-scm.com/downloads)
 
 As we will be using a ready made project, we will require git to clone from the project.
 
@@ -94,15 +94,15 @@ As we will be using a ready made project, we will require git to clone from the
 
 ### Project Setup
 
-* Open your `Terminal`.
-* Enter the following command to create a new project folder:
+- Open your `Terminal`.
+- Enter the following command to create a new project folder:
 
 ```bash title="Terminal"
 mkdir capstone_aelf
 cd capstone_aelf
 ```
 
-* Enter this command to create the capstone project.
+- Enter this command to create the capstone project.
 
 ```bash title="Terminal"
 dotnet new aelf -n BuildersDAO
@@ -110,21 +110,22 @@ dotnet new aelf -n BuildersDAO
 
 ### Adding Your Smart Contract Code
 
-* Open your project in your favorite IDE (like VSCode).
-* Rename the `src/Protobuf/contract/hello_world_contract.proto` file to `BuildersDAO.proto`.
-* After renaming the file, your working directory should look like this.
+- Open your project in your favorite IDE (like VSCode).
+- Rename the `src/Protobuf/contract/hello_world_contract.proto` file to `BuildersDAO.proto`.
+- After renaming the file, your working directory should look like this.
 
   ![img](/img/vote-be-project-dir.png)
-* That's it! Your project is now set up and ready to go 🚀
+
+- That's it! Your project is now set up and ready to go 🚀
 
 ### Defining Methods and Messages
 
 Let's add the RPC methods and message definitions to our Voting dApp.
 
-* Open `src/Protobuf/contract/BuildersDAO.proto`
-* Replace its contents with this code snippet.
+- Open `src/Protobuf/contract/BuildersDAO.proto`
+- Replace its contents with this code snippet.
 
-```csharp title="BuildersDAO.proto"
+```csharp title="src/Protobuf/contract/BuildersDAO.proto"
 syntax = "proto3";
 
 import "aelf/core.proto";
@@ -144,17 +145,17 @@ service BuildersDAO {
   // Actions -> Methods that change state of smart contract
   // This method sets up the initial state of our StackUpDAO smart contract
   rpc Initialize(google.protobuf.Empty) returns (google.protobuf.Empty);
-  
+
   // This method allows a user to become a member of the DAO by taking in their
   // address as an input parameter
   rpc JoinDAO(aelf.Address) returns (google.protobuf.Empty);
-  
+
   // This method allows a user to create a proposal for other users to vote on.
   // The method takes in a "CreateProposalInput" message which comprises of an
   // address, a title, description and a vote threshold (i.e how many votes
   // required for the proposal to pass)
   rpc CreateProposal(CreateProposalInput) returns (Proposal);
-  
+
   // This method allows a user to vote on proposals towards a specific proposal.
   // This method takes in a "VoteInput" message which takes in the address of
   // the voter, specific proposal and a boolean which represents their vote
@@ -166,8 +167,8 @@ service BuildersDAO {
   rpc GetAllProposals(google.protobuf.Empty) returns (ProposalList) {
     option (aelf.is_view) = true;
   }
-  
-  // aelf requires explicit getter methods to access the state value, 
+
+  // aelf requires explicit getter methods to access the state value,
   // so we provide these three getter methods for accessing the state
   // This method allows a user to fetch a proposal by proposalId
   rpc GetProposal (google.protobuf.StringValue) returns (Proposal) {
@@ -226,38 +227,38 @@ message ProposalList {
 
 ##### 1. **Define Syntax & Imports**
 
-* `proto3` version.
-* Import necessary Protobuf definitions and libraries.
+- `proto3` version.
+- Import necessary Protobuf definitions and libraries.
 
 ##### 2. **RPC Methods**
 
-* `Initialize` : Set up initial state
-* `JoinDAO` : User joins DAO. User's `address` is the function parameter.
-* `CreateProposal` : User creates a proposal. User's `address` , `title` , `description` , `vote threshold` are the function parameter.
-* `VoteOnProposal` : User votes on a proposal. User's `address` , `proposal` `vote` is the function parameter.
-* `GetAllProposals` : Fetch list of proposals
+- `Initialize` : Set up initial state
+- `JoinDAO` : User joins DAO. User's `address` is the function parameter.
+- `CreateProposal` : User creates a proposal. User's `address` , `title` , `description` , `vote threshold` are the function parameter.
+- `VoteOnProposal` : User votes on a proposal. User's `address` , `proposal` `vote` is the function parameter.
+- `GetAllProposals` : Fetch list of proposals
 
 ##### 3. **Getter Methods**
 
-* `GetProposal` : Fetch proposal by ID
-* `GetMemberCount` : Fetch member count
-* `GetMemberExist` : Check if a member exists by address
+- `GetProposal` : Fetch proposal by ID
+- `GetMemberCount` : Fetch member count
+- `GetMemberExist` : Check if a member exists by address
 
 ##### 4. **Message Definitions**
 
-* `Member` : DAO member (address)
-* `Proposal` : Proposal (title, description, votes, status, vote threshold)
-* `CreateProposalInput` : Fields for creating a proposal (title, description, vote threshold)
-* `VoteInput` : Fields for voting on a proposal (proposal ID, vote)
-* `MemberList` : List of DAO members
-* `ProposalList` : List of proposals
+- `Member` : DAO member (address)
+- `Proposal` : Proposal (title, description, votes, status, vote threshold)
+- `CreateProposalInput` : Fields for creating a proposal (title, description, vote threshold)
+- `VoteInput` : Fields for voting on a proposal (proposal ID, vote)
+- `MemberList` : List of DAO members
+- `ProposalList` : List of proposals
 
 ### Defining Contract State
 
-* Open the `src/BuildersDAOState.cs` file.
-* Replace its contents with this code snippet.
+- Open the `src/BuildersDAOState.cs` file.
+- Replace its contents with this code snippet.
 
-```csharp title="BuildersDAOState.proto"
+```csharp title="src/BuildersDAOState.cs"
 using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
 using AElf.Sdk.CSharp.State;
@@ -281,22 +282,22 @@ namespace AElf.Contracts.BuildersDAO
 
 ##### 3. **State Variables**
 
-* `Members` : Mapping each member to a boolean indicates if they joined the DAO
-* `Proposals` : Mapping each proposal to an ID for identification and retrieval
-* `MemberCountId` and `NextProposalId` : Track total number of members and proposals
+- `Members` : Mapping each member to a boolean indicates if they joined the DAO
+- `Proposals` : Mapping each proposal to an ID for identification and retrieval
+- `MemberCountId` and `NextProposalId` : Track total number of members and proposals
 
 #### Next Step
 
-* Implement the logic of our voting smart contract.
+- Implement the logic of our voting smart contract.
 
 ### Implement Voting Smart Contract Logic
 
 #### Checking Smart Contract Logics
 
-* Open `src/BuildersDAO.cs`
-* Replace the existing content with this code snippet.
+- Open `src/BuildersDAO.cs`
+- Replace the existing content with this code snippet.
 
-```csharp title="BuildersDAO.proto"
+```csharp title="src/BuildersDAO.cs"
 using System.Collections.Generic;
 using System.Security.Principal;
 using AElf.Sdk.CSharp;
@@ -324,13 +325,13 @@ namespace AElf.Contracts.BuildersDAO
 
         // Implement Get All Proposals Logic
         public override ProposalList GetAllProposals(Empty input) { }
-        
+
         // Implement Get Proposal Logic
         public override Proposal GetProposal(StringValue input) { }
-        
+
         // Implement Get Member Count Logic
         public override Int32Value GetMemberCount(Empty input) { }
-        
+
         // Implement Get Member Exist Logic
         public override BoolValue GetMemberExist(Address input) { }
     }
@@ -343,12 +344,12 @@ Aelf sidechain does not allow duplicate identical smart contracts. Hence, we wil
 
 #### Implementing Initialize Function
 
-* Go to the comment `Implement Vote on Proposal Logic`.
-* Check if the smart contract is already initialized; return if true.
-* Define a hardcoded proposal with necessary parameters.
-* Update the Proposals state variable with the hardcoded proposal and increment the proposalId.
+- Go to the comment `Implement Vote on Proposal Logic`.
+- Check if the smart contract is already initialized; return if true.
+- Define a hardcoded proposal with necessary parameters.
+- Update the Proposals state variable with the hardcoded proposal and increment the proposalId.
 
-```csharp title="BuildersDAO.proto"
+```csharp title="src/BuildersDAO.cs"
 // Implement Initialize Smart Contract Logic
 public override Empty Initialize(Empty input)
 {
@@ -364,23 +365,23 @@ public override Empty Initialize(Empty input)
     State.Proposals[initialProposal.Id] = initialProposal;
     State.NextProposalId.Value = 1;
     State.MemberCount.Value = 0;
-    
+
     State.Initialized.Value = true;
-    
+
     return new Empty();
 }
 ```
 
 #### Implementing Join DAO Function
 
-* Go to the comment `Implement Join DAO Logic`
-* Check if the member already exists in the DAO using the `Members` state variable.
-* If not found, update `Members` to include the user's address.
-* Increment `membersCount` to reflect the new member added.
+- Go to the comment `Implement Join DAO Logic`
+- Check if the member already exists in the DAO using the `Members` state variable.
+- If not found, update `Members` to include the user's address.
+- Increment `membersCount` to reflect the new member added.
 
 You'll implement this function. Once done, you can proceed to the next page to compare your code with the reference implementation.
 
-```csharp title="BuildersDAO.proto"
+```csharp title="src/BuildersDAO.cs"
 // Implement Join DAO Logic
 public override Empty JoinDAO(Address input)
 {
@@ -394,14 +395,14 @@ public override Empty JoinDAO(Address input)
 
 #### Implementing Create Proposal Function
 
-* Go to the comment `Implement Create Proposal Logic`
-* Check if the user is a DAO member (required to create proposals).
-* Create a new proposal object using fields from `CreateProposalInput`.
-* `Update` Proposals with the new proposal, increment NextProposalId, and return the created proposal object.
+- Go to the comment `Implement Create Proposal Logic`
+- Check if the user is a DAO member (required to create proposals).
+- Create a new proposal object using fields from `CreateProposalInput`.
+- `Update` Proposals with the new proposal, increment NextProposalId, and return the created proposal object.
 
 Now, use the provided code snippet to fill in the `CreateProposal` function.
 
-```csharp title="BuildersDAO.proto"
+```csharp title="src/BuildersDAO.cs"
 // Implement Create Proposal Logic
 public override Proposal CreateProposal(CreateProposalInput input)
 {
@@ -425,21 +426,22 @@ public override Proposal CreateProposal(CreateProposalInput input)
 
 #### Implementing Vote On Proposal Function
 
-* Go to the comment `Implement Vote on Logic`
-* Perform these checks:
+- Go to the comment `Implement Vote on Logic`
+- Perform these checks:
 
-  * Verify if the member is a DAO member (required to vote).
-  * Confirm if the proposal exists; otherwise, display an error message.
-  * Check if the member has already voted on the proposal; members can vote only once.
-* If all checks pass, store the member’s vote and update the proposal state.
-* Update the proposal status based on vote thresholds:
+  - Verify if the member is a DAO member (required to vote).
+  - Confirm if the proposal exists; otherwise, display an error message.
+  - Check if the member has already voted on the proposal; members can vote only once.
 
-  * If `yesVotes` reach the threshold, update status to "PASSED".
-  * If `noVotes` reach the threshold, update status to "DENIED".
+- If all checks pass, store the member’s vote and update the proposal state.
+- Update the proposal status based on vote thresholds:
+
+  - If `yesVotes` reach the threshold, update status to "PASSED".
+  - If `noVotes` reach the threshold, update status to "DENIED".
 
 Now, use the provided code snippet to complete the `VoteOnProposal` function.
 
-```csharp title="BuildersDAO.proto"
+```csharp title="src/BuildersDAO.cs"
 // Implement Vote on Proposal Logic
 public override Proposal VoteOnProposal(VoteInput input)
 {
@@ -480,17 +482,17 @@ public override Proposal VoteOnProposal(VoteInput input)
 
 #### Implementing Get All Proposals Function
 
-* Go to the comment `Implement Get All Proposals Logic`
-* Create a new `ProposalList` object from the message definition in `BuildersDAO.proto`.
-* Fetch and iterate through `Proposals`.
-* Update `ProposalList` with proposal objects and return the list of proposals.
+- Go to the comment `Implement Get All Proposals Logic`
+- Create a new `ProposalList` object from the message definition in `BuildersDAO.proto`.
+- Fetch and iterate through `Proposals`.
+- Update `ProposalList` with proposal objects and return the list of proposals.
 
-  * If `yesVotes` reach the threshold, update status to "PASSED".
-  * If `noVotes` reach the threshold, update status to "DENIED".
+  - If `yesVotes` reach the threshold, update status to "PASSED".
+  - If `noVotes` reach the threshold, update status to "DENIED".
 
 You'll implement this function. Once done, you can proceed to the next page to compare your code with the reference implementation.
 
-```csharp title="BuildersDAO.proto"
+```csharp title="src/BuildersDAO.cs"
 // Implement Get All Proposals Logic
 public override ProposalList GetAllProposals(Empty input)
 {
@@ -505,27 +507,27 @@ public override ProposalList GetAllProposals(Empty input)
 
 ##### 1. Get Proposal
 
-* Navigate to `Implement Get Proposal Logic`.
-* Retrieve a proposal by `proposalId`.
-* Use `proposalId` as the key to query `State.Proposals`.
-* Return the corresponding proposal value.
+- Navigate to `Implement Get Proposal Logic`.
+- Retrieve a proposal by `proposalId`.
+- Use `proposalId` as the key to query `State.Proposals`.
+- Return the corresponding proposal value.
 
 ##### 2. Get Member Count
 
-* Navigate to `Implement Get Member Count Logic`.
-* Retrieve the total member count.
-* Return the value of `MemberCount` from `State`.
+- Navigate to `Implement Get Member Count Logic`.
+- Retrieve the total member count.
+- Return the value of `MemberCount` from `State`.
 
 ##### 3. Get Member Exist
 
-* Navigate to `Implement Get Member Exist Logic`.
-* Check if a member exists by `address`.
-* Use `address` as the key to query `State.Members`.
-* Return the corresponding existence value.
+- Navigate to `Implement Get Member Exist Logic`.
+- Check if a member exists by `address`.
+- Use `address` as the key to query `State.Members`.
+- Return the corresponding existence value.
 
 Implement these methods to access different states effectively in your smart contract.
 
-```csharp title="BuildersDAO.proto"
+```csharp title="src/BuildersDAO.cs"
 // Implement Get Proposal Logic
 public override Proposal GetProposal(StringValue input)
 {
@@ -574,7 +576,7 @@ This process ensures thorough testing and readiness for deployment of our smart
 
   - \*\*Positive Cases:\*\*
 
-    - Call \`Initialize\` once and verify the proposal title using \`GetProposal\` with \`proposalId = "0"\`. 
+    - Call \`Initialize\` once and verify the proposal title using \`GetProposal\` with \`proposalId = "0"\`.
     - Check if the title is "Proposal #1" using \`ShouldBe\` method.
 
 \`\`\`csharp
@@ -606,11 +608,11 @@ public async Task InitializeTest_Duplicate()
 
 #### Implementing Join DAO Function
 
-* **Check Membership** : See if the address has already joined the DAO by checking State.Members. Use the Assert method for this verification.
-* **Add New Member** : If the address isn't a member yet, add it to State.Members and set its value to true.
-* **Update Member Count** : Increase State.MemberCount by 1 and save the new value.
+- **Check Membership** : See if the address has already joined the DAO by checking State.Members. Use the Assert method for this verification.
+- **Add New Member** : If the address isn't a member yet, add it to State.Members and set its value to true.
+- **Update Member Count** : Increase State.MemberCount by 1 and save the new value.
 
-```csharp title="BuildersDAO.proto"
+```csharp title="src/BuildersDAO.cs"
 public override Empty JoinDAO(Address input)
 {
     // Based on the address, determine whether the address has joined the DAO. If it has, throw an exception
@@ -626,12 +628,12 @@ public override Empty JoinDAO(Address input)
 
 #### Implementing Get All Proposals Function
 
-* Create a list object called `ProposalList`.
-* Loop from 0 to the value of `State.NextProposalId`.
-* In each loop iteration, get the values from `State.Proposals` and add them to `ProposalList`.
-* Return `ProposalList`.
+- Create a list object called `ProposalList`.
+- Loop from 0 to the value of `State.NextProposalId`.
+- In each loop iteration, get the values from `State.Proposals` and add them to `ProposalList`.
+- Return `ProposalList`.
 
-```csharp title="BuildersDAO.proto"
+```csharp title="src/BuildersDAO.cs"
 public override ProposalList GetAllProposals(Empty input)
 {
     // Create a new list called ProposalList
@@ -651,7 +653,7 @@ Once you've implemented these two methods and run the unit tests again, you shou
 
 ## Step 3 - Deploy Smart Contract
 
-import Deploy from "../_deploy.md"
+import Deploy from "../\_deploy.md"
 
 <Deploy />
 
@@ -659,7 +661,7 @@ import Deploy from "../_deploy.md"
 
 ### Project Setup
 
-Let's start by cloning the frontend project repository from GitHub. 
+Let's start by cloning the frontend project repository from GitHub.
 
 - Run the following command in the `capstone_aelf` directory:
 
@@ -675,7 +677,7 @@ cd `vote-contract`-frontend
 
 - Once you're in the `vote-contract-frontend` directory, open the project with your preferred IDE (e.g., VSCode). You should see the project structure as shown below.
 
-   ![result](/img/vote-fe-directory.png)
+  ![result](/img/vote-fe-directory.png)
 
 #### Install necessary libraries
 
@@ -687,7 +689,6 @@ npm install
 
 We are now ready to build the frontend components of our Voting dApp.
 
-
 ### Configure Portkey Provider & Write Connect Wallet Function
 
 We'll set up our Portkey provider to let users connect their Portkey wallets to our app and interact with our voting smart contract.
@@ -757,7 +758,6 @@ In this code, we fetch the Portkey wallet account using the provider and update
 
 With the Connect Wallet function defined, we're ready to write the remaining functions in the next steps.
 
-
 ### Write Initialize Smart Contract & Join DAO Functions
 
 Let's write the Initialize and Join DAO functions.
@@ -766,7 +766,6 @@ Let's write the Initialize and Join DAO functions.
 
 2. Replace the existing `initializeAndJoinDAO` function with this code snippet:
 
-
 ```javascript title="src/HomeDAO.ts"
 const initializeAndJoinDAO = async () => {
   //Step C - Write Initialize Smart Contract and Join DAO Logic
@@ -804,11 +803,10 @@ const initializeAndJoinDAO = async () => {
 
 Now, wrap the `initializeAndJoinDAO` function in the "Join DAO" button to trigger both Initialize and JoinDAO when clicked.
 
-   ![jao-button](/img/fe-join-dao-button.png)
+![jao-button](/img/fe-join-dao-button.png)
 
 Next, we'll write the **Create Proposal** function.
 
-
 ### Write Create Proposal Function
 
 Let's write the Create Proposal function.
@@ -821,15 +819,19 @@ Let's write the Create Proposal function.
 
 ```javascript title="src/CreateProposal.tsx"
 //Step D - Configure Proposal Form
-const form = useForm<z.infer<typeof formSchema>>({
-  resolver: zodResolver(formSchema),
-  defaultValues: {
-    address: currentWalletAddress,
-    title: "",
-    description: "",
-    voteThreshold: 0,
-  },
-});
+const form =
+  useForm <
+  z.infer <
+  typeof formSchema >>
+    {
+      resolver: zodResolver(formSchema),
+      defaultValues: {
+        address: currentWalletAddress,
+        title: "",
+        description: "",
+        voteThreshold: 0,
+      },
+    };
 ```
 
 :::tip
@@ -847,7 +849,6 @@ Default value:
 
 Now your form is ready for users to fill in the necessary details for their proposal.
 
-
 Now, let's write the Create Proposal function for the form submission.
 
 1. Scroll down to find the comment `Step E - Write Create Proposal Logic`.
@@ -893,8 +894,6 @@ function onSubmit(values: z.infer<typeof formSchema>) {
 
 Next, we'll write the **Vote** and **Fetch Proposal** functions to complete the frontend components of our Voting dApp.
 
-
-
 ### Write Vote & Fetch Proposals Function
 
 In this step, we'll write the Vote and Fetch Proposals functions to complete our Voting dApp's frontend components.
@@ -950,7 +949,6 @@ const voteYes = async (index: number) => {
 
 The `voteNo` function works similarly but sets the vote to `false`.
 
-
 - Scroll down to the `Step G - Use Effect to Fetch Proposals` comment and replace the `useEffect` hook with this code snippet:
 
 ```javascript title="src/HomeDAO.tsx"
@@ -968,10 +966,10 @@ useEffect(() => {
 
       if (!account) throw new Error("No account");
 
-      const proposalResponse = await DAOContract?.callViewMethod<IProposals>(
-        "GetAllProposals",
-        ""
-      );
+      const proposalResponse =
+        (await DAOContract?.callViewMethod) <
+        IProposals >
+        ("GetAllProposals", "");
 
       setProposals(proposalResponse?.data);
       alert("Fetched Proposals");
@@ -994,7 +992,6 @@ useEffect(() => {
 
 Now that we've written all the necessary frontend functions and components, we're ready to run the Voting dApp application in the next step.
 
-
 ### Run Application
 
 In this step, we will run the Voting dApp application.
@@ -1013,7 +1010,7 @@ npm run dev
 
 - You should observe the following as shown below.
 
-   ![run-app-success](/img/vote-npm-run-console.png)
+  ![run-app-success](/img/vote-npm-run-console.png)
 
 - Upon clicking on the **localhost URL**, you should be directed to the StackUpDAO landing page as shown below.
 
@@ -1023,12 +1020,11 @@ If you are developing and testing this with GitHub codespace, you can use Port F
 
 - Usually codespace will automatically forward port, you should see a pop-up message at the bottom right of your codespace browser window as shown in the diagram below:
 
-   ![open-in-browser](/img/codespace-forwarded-port.png)
+  ![open-in-browser](/img/codespace-forwarded-port.png)
 
 - Click the link to open the Voting dApp in the browser.
 
-   ![vote-fe-ui](/img/vote-fe-ui-1.png)
-
+  ![vote-fe-ui](/img/vote-fe-ui-1.png)
 
 #### Create Portkey Wallet
 
@@ -1044,7 +1040,6 @@ With DID solution as its core, Portkey provides both Portkey Wallet and Portkey
 For more information, you may visit the official documentation for Portkey at https://doc.portkey.finance/.
 :::
 
-
 - Download the Chrome extension for Portkey from https://chromewebstore.google.com/detail/portkey-wallet/iglbgmakmggfkoidiagnhknlndljlolb.
 
 :::info
@@ -1054,18 +1049,17 @@ You may download Chrome from https://www.google.com/intl/en_sg/chrome/.
 
 - Once you have downloaded the extension, you should see the following on your browser as shown below.
 
-   ![welcome-to-portkey](/img/welcome-to-portkey.png)
+  ![welcome-to-portkey](/img/welcome-to-portkey.png)
 
 - Click on `Get Start` and you should see the following interface as shown below.
 
-   ![portkey-login](/img/portkey-login.png)
+  ![portkey-login](/img/portkey-login.png)
 
-
-**Sign up** 
+**Sign up**
 
 - Switch to **aelf Testnet** network by selecting it:
 
-   ![portkey-switch-to-testnet](/img/portkey-switch-to-testnet.png)
+  ![portkey-switch-to-testnet](/img/portkey-switch-to-testnet.png)
 
 :::danger
 Please make sure you are using `aelf Testnet` in order to be able to receive your testnet tokens from the Faucet.
@@ -1073,7 +1067,7 @@ Please make sure you are using `aelf Testnet` in order to be able to receive you
 
 - Proceed to sign up with a Google Account or your preferred login method and complete the necessary accounts creation prompts and you should observe the following interface once you have signed up.
 
-   ![success-login](/img/success-login.png)
+  ![success-login](/img/success-login.png)
 
 With that, you have successfully created your very first Portkey wallet within seconds. How easy was that?
 
@@ -1083,8 +1077,7 @@ It is highly recommended to pin the Portkey wallet extension for easier access a
 
 - Next, click on ‘Open Portkey’ and you should now observe the following as shown below.
 
-   ![portkey-wallet-preview](/img/portkey-wallet-preview.png)
-
+  ![portkey-wallet-preview](/img/portkey-wallet-preview.png)
 
 **Connect Portkey Wallet**
 
@@ -1094,7 +1087,7 @@ It is highly recommended to pin the Portkey wallet extension for easier access a
 
 Once you have successfully joined the DAO, you should observe now that the landing page renders the proposal we have defined in our smart contract as shown below.
 
-   ![vote-fe-ui-joineddao](/img/vote-fe-ui-joineddao.png)
+![vote-fe-ui-joineddao](/img/vote-fe-ui-joineddao.png)
 
 - Proposal #1 as defined in smart contract
 
@@ -1106,45 +1099,43 @@ Once you have successfully joined the DAO, you should observe now that the landi
 
 - Proceed to click on **"Vote Yes"** and you should observe the following as shown below prompting you to sign the **"Vote Yes"** transaction.
 
-   ![fe-dapp-trans-sign](/img/fe-dapp-trans-sign.png)
+  ![fe-dapp-trans-sign](/img/fe-dapp-trans-sign.png)
 
 - Proceed to click on **"Sign"**.
 
 Upon a successful vote transaction, you should now observe that the proposal status has been updated to **"PASSED"** as shown below as the Yes vote count has reached the vote threshold.
 
-   ![vote-fe-ui-proposal-voted](/img/vote-fe-ui-proposal-voted.png)
+![vote-fe-ui-proposal-voted](/img/vote-fe-ui-proposal-voted.png)
 
 - Proposal status updated to **"PASSED"** Lastly, we will be creating a proposal to wrap up our demonstration of our Voting dApp.
 
 - Click on **"Create Proposal"** for Proceed and you should be directed to the Create Proposal page as shown below.
 
-   ![fe-dapp-create-proposal](/img/fe-dapp-create-proposal.png)
+  ![fe-dapp-create-proposal](/img/fe-dapp-create-proposal.png)
 
 - Proceed to fill in the following fields under the Create Proposal form:
- 
-   - **Title** - Proposal #2
 
-   - **Description** - Proposal to onboard Developer DAO
+  - **Title** - Proposal #2
 
-   - **Vote Threshold** - 10
+  - **Description** - Proposal to onboard Developer DAO
+
+  - **Vote Threshold** - 10
 
 - click on **"Submit"** and you should observe the following as shown below.
 
-   ![fe-submit-proposal-verify](/img/fe-submit-proposal-verify.png)
+  ![fe-submit-proposal-verify](/img/fe-submit-proposal-verify.png)
 
 - Click on **"Sign"** to Proceed.
 
 - Upon a successful proposal creation, you should be directed back to the landing page with the newly created proposal rendered on the landing page as shown below.
 
-   ![vote-fe-ui-new-proposal](/img/vote-fe-ui-new-proposal.png)
+  ![vote-fe-ui-new-proposal](/img/vote-fe-ui-new-proposal.png)
 
 :::success
 🎉 Congratulations Learners! You have successfully built your Voting dApp and this is no mean feat!
 :::
 
-
-## 🎯 Conclusion 
-
+## 🎯 Conclusion
 
 🎊 Congratulations on completing the Voting Contract tutorial! 🎊 You've reached an important milestone in your journey through aelf blockchain development. 🌟
 
@@ -1173,4 +1164,4 @@ Now that you've mastered the intricacies of voting contracts, it's time to explo
 
 Keep pushing the boundaries of blockchain technology with aelf. Your journey doesn't end here – it's just the beginning of even more exciting possibilities in decentralized applications and smart contracts. 🚀
 
-Happy coding and innovating with aelf! 😊
\ No newline at end of file
+Happy coding and innovating with aelf! 😊
diff --git a/docs/resources/contribution/index.md b/docs/resources/contribution/index.md
new file mode 100644
index 00000000..eac41673
--- /dev/null
+++ b/docs/resources/contribution/index.md
@@ -0,0 +1,37 @@
+---
+sidebar_position: 10
+title: Contribution Guide
+description: contribution guide
+---
+
+aelf is an [open source](https://github.com/aelfproject) and community driven project. This guide is aims to help anyone wants to contribute to the project.
+
+### Code Contribution
+
+You can always send pull requests to the Github repository.
+
+- Clone the [aelf repository](https://github.com/aelfproject/aelf/) from Github.
+- Make the required changes.
+- Send a pull request.
+
+Before making any change, please discuss it on the [Github issues](https://github.com/aelfproject/aelf/issues). In this way, no other developer will work on the same issue and your PR will have a better chance to be accepted.
+
+#### Bug Fixes & Enhancements
+
+You may want to fix a known bug or work on a planned enhancement. See [the issue list](https://github.com/aelfproject/aelf/issues) on Github.
+
+#### Feature Requests
+
+If you have a feature idea for the framework or modules, [create an issue](https://github.com/aelfproject/aelf/issues/new) on Github or attend to an existing discussion. Then you can implement it if it's embraced by the community.
+
+### Blog Posts & Tutorials
+
+If you decide to create some tutorials or blog posts on aelf, please inform us (by creating a [Github issue](https://github.com/aelfproject/aelf/issues)), so we may add a link to your tutorial/post in the official documentation and we can announce it on our [Twitter account](https://twitter.com/aelfblockchain).
+
+### Bug Report
+
+If you find any bug, please [create an issue on the Github repository](https://github.com/aelfproject/aelf/issues/new).
+
+### Thanks
+
+Thanks to ABP, we follow their contribute guides
diff --git a/docs/tools/chain-sdk/javascript-sdk/index.md b/docs/tools/chain-sdk/javascript-sdk/index.md
index 15916244..f9a7e830 100644
--- a/docs/tools/chain-sdk/javascript-sdk/index.md
+++ b/docs/tools/chain-sdk/javascript-sdk/index.md
@@ -829,7 +829,7 @@ To use aelf SDK, you need:
 
 ## About contributing
 
-Read out [contributing guide]
+Read out [contributing guide](../../../resources/contribution/index.md)
 
 ## About Version
 
diff --git a/docs/tools/chain-sdk/php-sdk/index.md b/docs/tools/chain-sdk/php-sdk/index.md
index a9abe54c..8c396da8 100644
--- a/docs/tools/chain-sdk/php-sdk/index.md
+++ b/docs/tools/chain-sdk/php-sdk/index.md
@@ -8,11 +8,13 @@ image: /img/Logo.aelf.svg
 # aelf-sdk.php - aelf PHP API
 
 ## Introduction
+
 aelf-sdk.php for aelf is similar to web.js for Ethereum. It consists of libraries that enable interaction with a local or remote aelf node via HTTP.
 
 This documentation will guide you through the installation and usage of aelf-sdk.php, with examples included. For more information, visit the [aelf-sdk.php repository](https://github.com/AElfProject/aelf-sdk.php).
 
 ## Adding aelf PHP SDK
+
 To install the library via Composer, run the following commands in your console:
 
 ```sh
@@ -33,6 +35,7 @@ If you cloned the SDK directly, you must install Composer and run it in the root
 ## Examples
 
 ### 1. Create an Instance
+
 Create a new instance of AElf and connect to an AELF chain node. Using this instance, you can call the AElf APIs.
 
 ```php
@@ -44,6 +47,7 @@ $aelf = new AElf($url);
 ```
 
 ### 2. Get a System Contract Address
+
 Get a system contract address. For example, to get the address of `AElf.ContractNames.Token`:
 
 ```php
@@ -61,6 +65,7 @@ $contractAddress = $aelf->GetContractAddressByName($privateKey, $bytes);
 ```
 
 ### 3. Send a Transaction
+
 Get the contract address and then send a transaction.
 
 ```php
@@ -113,7 +118,6 @@ $url = '127.0.0.1:8000';
 $aelf = new AElf($url);
 ```
 
-
 ### 1. Get Chain Status
 
 - **API Path**: `/api/blockChain/chainStatus`
@@ -122,19 +126,18 @@ $aelf = new AElf($url);
 
 - **Returns**:
 
-   - `Array`
-      - `ChainId` - String
-      - `Branches` - Array
-      - `NotLinkedBlocks` - Array
-      - `LongestChainHeight` - Integer
-      - `LongestChainHash` - String
-      - `GenesisBlockHash` - String
-      - `GenesisContractAddress` - String
-      - `LastIrreversibleBlockHash` - String
-      - `LastIrreversibleBlockHeight` - Integer
-      - `BestChainHash` - String
-      - `BestChainHeight` - Integer
-
+  - `Array`
+    - `ChainId` - String
+    - `Branches` - Array
+    - `NotLinkedBlocks` - Array
+    - `LongestChainHeight` - Integer
+    - `LongestChainHash` - String
+    - `GenesisBlockHash` - String
+    - `GenesisContractAddress` - String
+    - `LastIrreversibleBlockHash` - String
+    - `LastIrreversibleBlockHeight` - Integer
+    - `BestChainHash` - String
+    - `BestChainHeight` - Integer
 
 - **Example** :
 
@@ -146,8 +149,6 @@ $chainStatus = $aelf->getChainStatus();
 print_r($chainStatus);
 ```
 
-
-
 ### 2. Get Block Height
 
 - **API Path**: `/api/blockChain/blockHeight`
@@ -165,34 +166,33 @@ $height = $aelf->getBlockHeight();
 print($height);
 ```
 
-
 ### 3. getBlock
 
 - **API Path**: `/api/blockChain/block`
 
-- **Parameters**: 
-
-   - `block_hash` (String)
-   - `include_transactions` (Boolean)
-
-- **Returns**: 
-
-   - `Array`
-      - `BlockHash` - String
-      - `Header` - Array
-         - `PreviousBlockHash` - String
-         - `MerkleTreeRootOfTransactions` - String
-         - `MerkleTreeRootOfWorldState` - String
-         - `Extra` - List
-         - `Height` - Integer
-         - `Time` - String
-         - `ChainId` - String
-         - `Bloom` - String
-         - `SignerPubkey` - String
-      - `Body` - Array
-         - `TransactionsCount` - Integer
-         - `Transactions` - Array
-            - `transactionId` - String
+- **Parameters**:
+
+  - `block_hash` (String)
+  - `include_transactions` (Boolean)
+
+- **Returns**:
+
+  - `Array`
+    - `BlockHash` - String
+    - `Header` - Array
+      - `PreviousBlockHash` - String
+      - `MerkleTreeRootOfTransactions` - String
+      - `MerkleTreeRootOfWorldState` - String
+      - `Extra` - List
+      - `Height` - Integer
+      - `Time` - String
+      - `ChainId` - String
+      - `Bloom` - String
+      - `SignerPubkey` - String
+    - `Body` - Array
+      - `TransactionsCount` - Integer
+      - `Transactions` - Array
+        - `transactionId` - String
 
 - **Example** :
 
@@ -204,35 +204,33 @@ $block2 = $aelf->getBlockByHash($block['BlockHash'], false);
 print_r($block2);
 ```
 
-
 ### 4. Get Block by Height
 
 - **API Path**: `/api/blockChain/blockByHeight`
 
-- **Parameters**: 
-
-   - `block_height` (Number)
-   - `include_transactions` (Boolean)
+- **Parameters**:
 
-- **Returns**: 
+  - `block_height` (Number)
+  - `include_transactions` (Boolean)
 
-   - `Array`
-      - `BlockHash` - String
-      - `Header` - Array
-         - `PreviousBlockHash` - String
-         - `MerkleTreeRootOfTransactions` - String
-         - `MerkleTreeRootOfWorldState` - String
-         - `Extra` - List
-         - `Height` - Integer
-         - `Time` - String
-         - `ChainId` - String
-         - `Bloom` - String
-         - `SignerPubkey` - String
-      - `Body` - Array
-         - `TransactionsCount` - Integer
-         - `Transactions` - Array
-            - `transactionId` - String
+- **Returns**:
 
+  - `Array`
+    - `BlockHash` - String
+    - `Header` - Array
+      - `PreviousBlockHash` - String
+      - `MerkleTreeRootOfTransactions` - String
+      - `MerkleTreeRootOfWorldState` - String
+      - `Extra` - List
+      - `Height` - Integer
+      - `Time` - String
+      - `ChainId` - String
+      - `Bloom` - String
+      - `SignerPubkey` - String
+    - `Body` - Array
+      - `TransactionsCount` - Integer
+      - `Transactions` - Array
+        - `transactionId` - String
 
 - **Example** :
 
@@ -243,38 +241,37 @@ $block = $aelf->getBlockByHeight(1, true);
 print_r($block);
 ```
 
-
 ### 5. Get Transaction Result
 
 - **API Path**: `/api/blockChain/transactionResult`
 
-- **Parameters**: 
+- **Parameters**:
 
-   - `transactionId` (String)
+  - `transactionId` (String)
 
 - **Returns**:
 
-   - `Object`
-      - `TransactionId` - String
-      - `Status` - String
-      - `Logs` - Array
-         - `Address` - String
-         - `Name` - String
-         - `Indexed` - Array
-         - `NonIndexed` - String
-      - `Bloom` - String
-      - `BlockNumber` - Integer
-      - `Transaction` - Array
-         - `From` - String
-         - `To` - String
-         - `RefBlockNumber` - Integer
-         - `RefBlockPrefix` - String
-         - `MethodName` - String
-         - `Params` - json
-         - `Signature` - String
-            - `transactionId` - String
-      - `ReadableReturnValue` - String
-      - `Error` - String
+  - `Object`
+    - `TransactionId` - String
+    - `Status` - String
+    - `Logs` - Array
+      - `Address` - String
+      - `Name` - String
+      - `Indexed` - Array
+      - `NonIndexed` - String
+    - `Bloom` - String
+    - `BlockNumber` - Integer
+    - `Transaction` - Array
+      - `From` - String
+      - `To` - String
+      - `RefBlockNumber` - Integer
+      - `RefBlockPrefix` - String
+      - `MethodName` - String
+      - `Params` - json
+      - `Signature` - String
+        - `transactionId` - String
+    - `ReadableReturnValue` - String
+    - `Error` - String
 
 - **Example** :
 
@@ -286,21 +283,20 @@ $transactionResult = $aelf->getTransactionResult($block['Body']['Transactions'][
 print_r($transactionResult);
 ```
 
-
 ### 6. Get Multiple Transaction Results
 
 - **API Path**: `/api/blockChain/transactionResults`
 
-- **Parameters**: 
+- **Parameters**:
 
-   - `blockHash` (String)
-   - `offset` (Number)
-   - `limit` (Number)
+  - `blockHash` (String)
+  - `offset` (Number)
+  - `limit` (Number)
 
-- **Returns**: 
+- **Returns**:
 
-   - `List` - The array of method descriptions:
-      - the transaction result object
+  - `List` - The array of method descriptions:
+    - the transaction result object
 
 - **Example** :
 
@@ -312,7 +308,6 @@ $transactionResults = $aelf->getTransactionResults($block['Body']);
 print_r($transactionResults);
 ```
 
-
 ### 7. Get Transaction Pool Status
 
 - **API Path**: `/api/blockChain/transactionPoolStatus`
@@ -326,16 +321,15 @@ $status = $aelf->getTransactionPoolStatus();
 print_r($status);
 ```
 
-
 ### 8. Send Transaction
 
 - **API Path**: `/api/blockChain/sendTransaction`
 
 - **Method**: POST
 
-- **Parameters**: 
+- **Parameters**:
 
-   - `transaction` (String)
+  - `transaction` (String)
 
 - **Example** :
 
@@ -348,16 +342,15 @@ $result = $aelf->sendTransaction($executeTransactionDtoObj);
 print_r($result);
 ```
 
-
 ### 9. Send Multiple Transactions
 
 - **API Path**: `/api/blockChain/sendTransactions`
 
 - **Method**:POST
 
-- **Parameters**: 
+- **Parameters**:
 
-   - `transactions` (String)
+  - `transactions` (String)
 
 - **Example** :
 
@@ -376,7 +369,6 @@ $listString = $aelf->sendTransactions($sendTransactionsInputs);
 print_r($listString);
 ```
 
-
 ### 10. Get Peers
 
 - **API Path**: `/api/net/peers`
@@ -387,7 +379,6 @@ print_r($listString);
 print_r($aelf->getPeers(true));
 ```
 
-
 ### 11. Add Peer
 
 - **API Path**: `/api/net/peer`
@@ -396,7 +387,7 @@ print_r($aelf->getPeers(true));
 
 - **Parameters**:
 
-   - `peer_address` (String)
+  - `peer_address` (String)
 
 - **Example** :
 
@@ -404,14 +395,13 @@ print_r($aelf->getPeers(true));
 $aelf->addPeer($url);
 ```
 
-
 ### 12. Remove Peer
 
 - **API Path**: `/api/net/peer`
 
 - **Parameters**:
 
-   - `peer_address` (String)
+  - `peer_address` (String)
 
 - **Example** :
 
@@ -419,21 +409,20 @@ $aelf->addPeer($url);
 $aelf->removePeer($url);
 ```
 
-
 ### 13. Create Raw Transaction
 
 - **API Path**: `/api/blockchain/rawTransaction`
 
 - **Method**: POST
 
-- **Parameters**: 
+- **Parameters**:
 
-   - `transaction` (Array)
+  - `transaction` (Array)
 
-- **Returns**: 
+- **Returns**:
 
-   - `Array`
-      - `RawTransaction` - hex string bytes generated by transaction information
+  - `Array`
+    - `RawTransaction` - hex string bytes generated by transaction information
 
 - **Example** :
 
@@ -455,16 +444,15 @@ $rawTransaction = $aelf->createRawTransaction($transaction);
 print_r($rawTransaction);
 ```
 
-
 ### 14. Send Raw Transaction
 
 - **API Path**: `/api/blockchain/sendRawTransaction`
 
-- **Parameters**: 
+- **Parameters**:
 
-   - `Transaction` (raw transaction)
-   - `Signature` (signature)
-   - `ReturnTransaction` (indicates whether to return transaction)
+  - `Transaction` (raw transaction)
+  - `Signature` (signature)
+  - `ReturnTransaction` (indicates whether to return transaction)
 
 - **Example** :
 
@@ -479,19 +467,16 @@ $execute = $aelf->sendRawTransaction($transaction);
 print_r($execute);
 ```
 
-
-
 ### 15. Execute Raw Transaction
 
 - **API Path**: `/api/blockchain/executeRawTransaction`
 
 - **Method**: POST
 
-- **Parameters**: 
-
-   - `RawTransaction` (raw transaction)
-   - `Signature` (signature)
+- **Parameters**:
 
+  - `RawTransaction` (raw transaction)
+  - `Signature` (signature)
 
 - **Example** :
 
@@ -506,14 +491,13 @@ $execute = $aelf->executeRawTransaction($transaction);
 print_r($execute);
 ```
 
-
 ### 16. Get Merkle Path by Transaction ID
 
 - **API Path**: `/api/blockchain/merklePathByTransactionId`
 
-- **Parameters**: 
+- **Parameters**:
 
-   - `transactionId` (String)
+  - `transactionId` (String)
 
 - **Example** :
 
@@ -525,24 +509,23 @@ $merklePath = $aelf->getMerklePathByTransactionId($block['Body']['Transactions']
 print_r($merklePath);
 ```
 
-
 ### 17. Calculate Transaction Fee
 
 - **API Path**: `/api/blockChain/calculateTransactionFee`
 
 - **Method**: POST
 
-- **Parameters**: 
+- **Parameters**:
 
-   - `CalculateTransactionFeeInput` (Object)
+  - `CalculateTransactionFeeInput` (Object)
 
-- **Returns**: 
+- **Returns**:
 
-   - `CalculateTransactionFeeOutput (Object)`
+  - `CalculateTransactionFeeOutput (Object)`
 
-       - `Success` - bool
-       - `TransactionFee` - Array
-       - `ResourceFee` - Array
+    - `Success` - bool
+    - `TransactionFee` - Array
+    - `ResourceFee` - Array
 
 - **Example** :
 
@@ -556,7 +539,6 @@ $result = $aelf->calculateTransactionFee($calculateTransactionFeeInputParam);
 print_r($result);
 ```
 
-
 ### 18. Get Network Info
 
 - **API Path**: `/api/net/networkInfo`
@@ -569,7 +551,6 @@ $aelf = new AElf($url);
 print_r($aelf->getNetworkInfo());
 ```
 
-
 ### 19. Get Contract File Descriptor Set
 
 - **API Path**: `/api/blockchain/contractFileDescriptorSet`
@@ -587,7 +568,6 @@ foreach ($transactionResultDtoList as $v) {
 }
 ```
 
-
 ### 20. Get Task Queue Status
 
 - **API Path**: `/api/blockchain/taskQueueStatus`
@@ -601,7 +581,6 @@ $taskQueueStatus = $aelf->getTaskQueueStatus();
 print_r($taskQueueStatus);
 ```
 
-
 ### 21. Execute Transaction
 
 - **API Path**: `/api/blockchain/executeTransaction`
@@ -626,8 +605,6 @@ $tokenInfo = new TokenInfo();
 $tokenInfo->mergeFromString(hex2bin($response));
 ```
 
-
-
 ## Other Tool Kit
 
 aelf supplies some APIs to simplify development.
@@ -641,8 +618,7 @@ $chainId = $aelf->getChainId();
 print_r($chainId);
 ```
 
-
-###  2. Generate Transaction
+### 2. Generate Transaction
 
 ```php
 $aelf = new AElf($url);
@@ -652,8 +628,7 @@ $param->setValue('');
 $transaction = $aelf->generateTransaction($fromAddress, $toAddress, $methodName, $param);
 ```
 
-
-###  3. Sign Transaction
+### 3. Sign Transaction
 
 ```php
 $aelf = new AElf($url);
@@ -662,7 +637,6 @@ $transaction = $aelf->generateTransaction($fromAddress, $toAddress, $methodName,
 $signature = $aelf->signTransaction($privateKey, $transaction);
 ```
 
-
 ### 4. Get Genesis Contract Address
 
 ```php
@@ -672,8 +646,8 @@ $genesisContractAddress = $aelf->getGenesisContractAddress();
 print_r($genesisContractAddress);
 ```
 
-
 ### 5. Get Address From PubKey
+
 Calculate the account address according to the public key.
 
 ```php
@@ -683,8 +657,8 @@ $pubKeyAddress = $aelf->getAddressFromPubKey('04166cf4be901dee1c21f3d97b9e4818f2
 print_r($pubKeyAddress);
 ```
 
-
 ### 6. Get Formatted Address
+
 Convert the address to the displayed string: symbol_base58-string_base58-string_chain_id.
 
 ```php
@@ -694,8 +668,8 @@ $addressVal = $aelf->getFormattedAddress($privateKey, $base58Address);
 print_r($addressVal);
 ```
 
-
 ### 7. Generate Key Pair Info
+
 Generate a new key pair using ECDSA.
 
 ```php
@@ -705,8 +679,7 @@ $pairInfo = $aelf->generateKeyPairInfo();
 print_r($pairInfo);
 ```
 
-
-###  8. Get Contract Address By Name
+### 8. Get Contract Address By Name
 
 ```php
 $aelf = new AElf($url);
@@ -717,7 +690,6 @@ $contractAddress = $aelf->GetContractAddressByName($privateKey, $bytes);
 print_r($contractAddress);
 ```
 
-
 ### 9. Get Address From Private Key
 
 ```php
@@ -727,7 +699,6 @@ $address = $aelf->getAddressFromPrivateKey($privateKey);
 print_r($address);
 ```
 
-
 ### 10. Get Signature With Private Key
 
 ```php
@@ -737,7 +708,6 @@ $sign = $aelf->getSignatureWithPrivateKey($privateKey, $transactionId);
 print_r($sign);
 ```
 
-
 ### 11. Is Connected
 
 ```php
@@ -747,11 +717,11 @@ $isConnected = $this->aelf->isConnected();
 print_r($isConnected);
 ```
 
-
 ### 12. Get Transaction Fees
+
 Get the transaction fee from the transaction result.
 
-```php      
+```php
 $aelf = new AElf($url);
 
 $block = $aelf->getBlockByHeight(1, true);
@@ -769,18 +739,14 @@ $aelf = new AElf($url);
 $version = $aelf->version;
 ```
 
-
 ## Requirements
 
 - [**php**](https://php.net)
 
-
-
 ## About contributing
-Read out [contributing guide]
+
+Read out [contributing guide](../../../resources/contribution/index.md)
 
 ## About Version
 
 [https://semver.org/](https://semver.org/)
-
-
diff --git a/docs/tools/chain-sdk/python-sdk/index.md b/docs/tools/chain-sdk/python-sdk/index.md
index 6a3b6611..f2ce79c4 100644
--- a/docs/tools/chain-sdk/python-sdk/index.md
+++ b/docs/tools/chain-sdk/python-sdk/index.md
@@ -29,7 +29,6 @@ from aelf import AElf
 chain = AElf('http://127.0.0.1:8000')
 ```
 
-
 ## Examples
 
 You can find more examples in the `./test` directory of the repository.
@@ -45,7 +44,6 @@ from aelf import AElf
 aelf = AElf('http://127.0.0.1:8000')
 ```
 
-
 ### 2. Get a System Contract Address
 
 To get a system contract address, for example, the `AElf.ContractNames.Token`, use the following code:
@@ -63,7 +61,6 @@ genesis_contract_address = aelf.get_genesis_contract_address_string()
 multi_token_contract_address = aelf.get_system_contract_address('AElf.ContractNames.Token')
 ```
 
-
 ### 3. Send a Transaction
 
 To send a transaction, first get the contract address and then use the following steps:
@@ -93,9 +90,7 @@ aelf.sign_transaction(private_key, transaction)
 aelf.execute_transaction(transaction)
 ```
 
-By following these instructions, you can effectively interact with the aelf blockchain using the `aelf-sdk.py`   library. For more detailed examples and information, please refer to the [aelf-sdk.py repository](https://github.com/AElfProject/aelf-sdk.py).
-
-
+By following these instructions, you can effectively interact with the aelf blockchain using the `aelf-sdk.py` library. For more detailed examples and information, please refer to the [aelf-sdk.py repository](https://github.com/AElfProject/aelf-sdk.py).
 
 ## Web API
 
@@ -105,7 +100,6 @@ For example, if your local address is `http://127.0.0.1:1235`, you can access it
 
 Before using these methods, make sure you have an `AElf` instance. If not, create one as shown below:
 
-
 ```python
 from aelf import AElf
 
@@ -113,28 +107,27 @@ from aelf import AElf
 aelf = AElf('http://127.0.0.1:8000')
 ```
 
-
 ### 1. Get Chain Status
 
 **Web API Path**: `/api/blockChain/chainStatus`
 
 **Parameters**: None
 
-**Returns**: 
+**Returns**:
 
-   - `JSON`
+- `JSON`
 
-      - `ChainId` - String
-      - `Branches` - JSON
-      - `NotLinkedBlocks` - JSON
-      - `LongestChainHeight` - Number
-      - `LongestChainHash` - String
-      - `GenesisBlockHash` - String
-      - `GenesisContractAddress` - String
-      - `LastIrreversibleBlockHash` - String
-      - `LastIrreversibleBlockHeight` - Number
-      - `BestChainHash` - String
-      - `BestChainHeight` - Number
+  - `ChainId` - String
+  - `Branches` - JSON
+  - `NotLinkedBlocks` - JSON
+  - `LongestChainHeight` - Number
+  - `LongestChainHash` - String
+  - `GenesisBlockHash` - String
+  - `GenesisContractAddress` - String
+  - `LastIrreversibleBlockHash` - String
+  - `LastIrreversibleBlockHeight` - Number
+  - `BestChainHash` - String
+  - `BestChainHeight` - Number
 
 **Example**:
 
@@ -144,7 +137,6 @@ chain_status = aelf.get_chain_status()
 print('# get_chain_status', chain_status)
 ```
 
-
 ### 2. Get Block Height
 
 **Web API Path**: `/api/blockChain/blockHeight`
@@ -161,35 +153,34 @@ block_height = aelf.get_block_height()
 print('# get_block_height', block_height)
 ```
 
-
 ### 3. Get Block
 
 **Web API Path**: /api/blockChain/block
 
 **Parameters**: None
 
-   - `block_hash` - String
-   - `include_transactions` - Boolean (true to include transaction IDs list, false otherwise)
-
-**Returns**: 
-
-   - `JSON`
-
-   - `BlockHash` - String
-   - `Header` - JSON
-      - `PreviousBlockHash` - String
-      - `MerkleTreeRootOfTransactions` - String
-      - `MerkleTreeRootOfWorldState` - String
-      - `Extra` - List
-      - `Height` - Number
-      - `Time` - JSON
-      - `ChainId` - String
-      - `Bloom` - String
-      - `SignerPubkey` - String
-   - `Body` - JSON
-      - `TransactionsCount` - Number
-      - `Transactions` - List
-         - `transactionId` - String
+- `block_hash` - String
+- `include_transactions` - Boolean (true to include transaction IDs list, false otherwise)
+
+**Returns**:
+
+- `JSON`
+
+- `BlockHash` - String
+- `Header` - JSON
+  - `PreviousBlockHash` - String
+  - `MerkleTreeRootOfTransactions` - String
+  - `MerkleTreeRootOfWorldState` - String
+  - `Extra` - List
+  - `Height` - Number
+  - `Time` - JSON
+  - `ChainId` - String
+  - `Bloom` - String
+  - `SignerPubkey` - String
+- `Body` - JSON
+  - `TransactionsCount` - Number
+  - `Transactions` - List
+    - `transactionId` - String
 
 **Example**:
 
@@ -199,35 +190,34 @@ block = aelf.get_block(blockHash)
 print('# get_block', block)
 ```
 
-
 ### 4. Get Block by Height
 
 **Web API Path**: /api/blockChain/blockByHeight
 
-**Parameters**: 
-
-   - `block_height` - Number
-   - `include_transactions` - Boolean (true to include transaction IDs list, false otherwise)
-
-**Returns**: 
-
-   - `JSON`
+**Parameters**:
 
-   - `BlockHash` - String
-   - `Header` - JSON
-      - `PreviousBlockHash` - String
-      - `MerkleTreeRootOfTransactions` - String
-      - `MerkleTreeRootOfWorldState` - String
-      - `Extra` - List
-      - `Height` - Number
-      - `Time` - JSON
-      - `ChainId` - String
-      - `Bloom` - String
-      - `SignerPubkey` - String
-   - `Body` - JSON
-      - `TransactionsCount` - Number
-      - `Transactions` - List
-         - `transactionId` - String
+- `block_height` - Number
+- `include_transactions` - Boolean (true to include transaction IDs list, false otherwise)
+
+**Returns**:
+
+- `JSON`
+
+- `BlockHash` - String
+- `Header` - JSON
+  - `PreviousBlockHash` - String
+  - `MerkleTreeRootOfTransactions` - String
+  - `MerkleTreeRootOfWorldState` - String
+  - `Extra` - List
+  - `Height` - Number
+  - `Time` - JSON
+  - `ChainId` - String
+  - `Bloom` - String
+  - `SignerPubkey` - String
+- `Body` - JSON
+  - `TransactionsCount` - Number
+  - `Transactions` - List
+    - `transactionId` - String
 
 **Example**:
 
@@ -237,38 +227,37 @@ block_by_height = aelf.get_block_by_height(12, False)
 print('# get_block_by_height', block_by_height)
 ```
 
-
 ### 5. Get Transaction Result
 
 **Web API Path**: /api/blockChain/transactionResult
 
 **Parameters**:
 
-   - `transactionId` - String
-
-**Returns**: 
-
-   - `JSON`
-
-      - `TransactionId` - String
-      - `Status` - String
-      - `Logs` - List
-         - `Address` - String
-         - `Name` - String
-         - `Indexed` - List
-         - `NonIndexed` - String
-      - `Bloom` - String
-      - `BlockNumber` - Number
-      - `Transaction` - List
-         - `From` - Number
-         - `To` -  Number
-         - `RefBlockNumber` - Number
-         - `RefBlockPrefix` - String
-         - `MethodName` - String
-         - `Params` - JSON
-         - `Signature` - String
-      - `ReadableReturnValue` - JSON
-      - `Error` - String
+- `transactionId` - String
+
+**Returns**:
+
+- `JSON`
+
+  - `TransactionId` - String
+  - `Status` - String
+  - `Logs` - List
+    - `Address` - String
+    - `Name` - String
+    - `Indexed` - List
+    - `NonIndexed` - String
+  - `Bloom` - String
+  - `BlockNumber` - Number
+  - `Transaction` - List
+    - `From` - Number
+    - `To` - Number
+    - `RefBlockNumber` - Number
+    - `RefBlockPrefix` - String
+    - `MethodName` - String
+    - `Params` - JSON
+    - `Signature` - String
+  - `ReadableReturnValue` - JSON
+  - `Error` - String
 
 **Example**:
 
@@ -278,17 +267,15 @@ transaction_result = aelf.get_transaction_result(transactionId)
 print('# get_transaction_result', transaction_result)
 ```
 
-
 ### 6. Get Transaction Results
 
 **Web API Path**: /api/blockChain/transactionResults
 
 **Parameters**:
 
-   - `blockHash` - String
-   - `offset` - Number
-   - `limit` - Number
-
+- `blockHash` - String
+- `offset` - Number
+- `limit` - Number
 
 **Returns**: `List` of transaction result objects
 
@@ -300,8 +287,6 @@ transaction_results = aelf.get_transaction_results(blockHash, 0, 2)
 print('# get_transaction_results', transaction_results)
 ```
 
-
-
 ### 7. Get Transaction Pool Status
 
 **Web API Path**: /api/blockChain/transactionPoolStatus
@@ -314,7 +299,6 @@ tx_pool_status = aelf.get_transaction_pool_status()
 print('# get_transaction_pool_status', tx_pool_status)
 ```
 
-
 ### 8. Send Transaction
 
 **Web API Path**: `/api/blockChain/sendTransaction`
@@ -323,7 +307,7 @@ print('# get_transaction_pool_status', tx_pool_status)
 
 **Parameters**:
 
-   - `transaction` - String (serialized data)
+- `transaction` - String (serialized data)
 
 **Example**:
 
@@ -341,8 +325,6 @@ result = aelf.send_transaction(transaction.SerializePartialToString().hex())
 print('# send_transaction', result)
 ```
 
-
-
 ### 9. Send Transactions
 
 **Web API Path**: `/api/blockChain/sendTransaction`
@@ -351,7 +333,7 @@ print('# send_transaction', result)
 
 **Parameters**:
 
-   - `transactions` - String (serialized data)
+- `transactions` - String (serialized data)
 
 **Example**:
 
@@ -365,7 +347,6 @@ result = aelf.send_transaction(transaction1 + ',' + transaction2)
 print('# send_transactions', result)
 ```
 
-
 ### 10. Get Peers
 
 **Web API Path**: `/api/net/peers`
@@ -378,7 +359,6 @@ peers = aelf.get_peers()
 print('# get_peers', peers)
 ```
 
-
 ### 11. Add Peer
 
 **Web API Path**: `/api/net/peers`
@@ -387,7 +367,7 @@ print('# get_peers', peers)
 
 **Parameters**:
 
-   - `peer_address` - String (peer’s endpoint)
+- `peer_address` - String (peer’s endpoint)
 
 **Example**:
 
@@ -397,8 +377,6 @@ add_peer = aelf.add_peer(endpoint)
 print('# add_peer', add_peer)
 ```
 
-
-
 ### 12. Remove Peer
 
 **Web API Path**: `/api/net/peer?address=`
@@ -407,7 +385,7 @@ print('# add_peer', add_peer)
 
 **Parameters**:
 
-   - `peer_address` - String (peer’s endpoint)
+- `peer_address` - String (peer’s endpoint)
 
 **Example**:
 
@@ -425,12 +403,12 @@ print('# remove_peer', remove_peer)
 
 **Parameters**:
 
-   - `transaction` - JSON format transaction
+- `transaction` - JSON format transaction
 
-**Returns**: 
+**Returns**:
 
-   - `JSON`
-      - `RawTransaction` - hex string bytes generated by transaction information
+- `JSON`
+  - `RawTransaction` - hex string bytes generated by transaction information
 
 **Example**:
 
@@ -448,7 +426,6 @@ raw_transaction = aelf.create_raw_transaction(transaction)
 print('# create_raw_transaction', raw_transaction)
 ```
 
-
 ### 14. Send Raw Transaction
 
 **Web API Path**: `/api/blockchain/sendRawTransaction`
@@ -457,9 +434,9 @@ print('# create_raw_transaction', raw_transaction)
 
 **Parameters**:
 
-   - `Transaction` - raw transaction
-   - `Signature` - signature
-   - `ReturnTransaction` - indicates whether to return the transaction
+- `Transaction` - raw transaction
+- `Signature` - signature
+- `ReturnTransaction` - indicates whether to return the transaction
 
 **Example**:
 
@@ -499,8 +476,8 @@ print('# send_raw_transaction', result)
 
 **Parameters**:
 
-   - `RawTransaction` - raw transaction
-   - `Signature` - signature
+- `RawTransaction` - raw transaction
+- `Signature` - signature
 
 **Example**:
 
@@ -531,7 +508,6 @@ result = aelf.execute_raw_transaction(transaction_1)
 print('# execute_raw_transaction', result)
 ```
 
-
 ### 16. Get Merkle Path
 
 **Web API Path**: `/api/blockchain/merklePathByTransactionId?transactionId=`
@@ -540,7 +516,7 @@ print('# execute_raw_transaction', result)
 
 **Parameters**:
 
-   - `transactionId` - String
+- `transactionId` - String
 
 **Example**:
 
@@ -552,7 +528,6 @@ merkle_path = aelf.get_merkle_path(transaction_id)
 print('# get_merkle_path', merkle_path)
 ```
 
-
 ### 17. Calculate Transaction Fee
 
 **Web API Path**: `/api/blockchain/calculateTransactionFee`
@@ -561,15 +536,15 @@ print('# get_merkle_path', merkle_path)
 
 **Parameters**:
 
-   - `CalculateTransactionFeeInput` - JSON with the following structure:
-      - `RawTransaction` - String
+- `CalculateTransactionFeeInput` - JSON with the following structure:
+  - `RawTransaction` - String
 
-**Returns**: 
+**Returns**:
 
-   - `CalculateTransactionFeeOutput` - `json` - The json with the following structure :
-      - `Success` - Boolean
-      - `TransactionFee` - Array
-      - `ResourceFee` - Array
+- `CalculateTransactionFeeOutput` - `json` - The json with the following structure :
+  - `Success` - Boolean
+  - `TransactionFee` - Array
+  - `ResourceFee` - Array
 
 **Example**:
 
@@ -584,8 +559,6 @@ calculate_transaction_fee_output = aelf.calculate_transaction_fee(calculate_tran
 print('# calculate_transaction_fee', calculate_transaction_fee_output)
 ```
 
-
-
 ### 18. Get Network Info
 
 **Web API Path**: `/api/net/networkInfo`
@@ -601,8 +574,6 @@ network_info = aelf.get_network_info()
 print('# get_network_info', network_info)
 ```
 
-
-
 ## AElf.client
 
 Use the API to see detailed results.
@@ -619,16 +590,15 @@ aelf = AElf(url)
 genesis_contract_address = aelf.get_genesis_contract_address_string()
 ```
 
-
 ### 2. get_system_contract_address
 
 **Parameters:**
 
-   - `contract_name` - String: system contract’s name
+- `contract_name` - String: system contract’s name
 
 **Returns:**
 
-   - `Address`: system contract’s address
+- `Address`: system contract’s address
 
 **Example:**
 
@@ -638,16 +608,15 @@ aelf = AElf(url)
 multi_token_contract_address = aelf.get_system_contract_address('AElf.ContractNames.Token')
 ```
 
-
 ### 3. get_system_contract_address_string
 
 **Parameters:**
 
-   - `contract_name` - String: system contract’s name
+- `contract_name` - String: system contract’s name
 
 **Returns:**
 
-   - `String`: system contract’s address
+- `String`: system contract’s address
 
 **Example:**
 
@@ -657,14 +626,13 @@ aelf = AElf(url)
 multi_token_contract_address_string = aelf.get_system_contract_address_string('AElf.ContractNames.Token')
 ```
 
-
 ### 4. create_transaction
 
 **Parameters:**
 
-   - `to_address` - Address or String: target contract’s address
-   - `method_name` - String: method name
-   - `params` - String: serialize parameters into String
+- `to_address` - Address or String: target contract’s address
+- `method_name` - String: method name
+- `params` - String: serialize parameters into String
 
 **Example:**
 
@@ -676,15 +644,14 @@ params.value = hashlib.sha256(contract_name.encode('utf8')).digest()
 transaction = aelf.create_transaction(genesisContractAddress, 'GetContractAddressByName', params.SerializeToString())
 ```
 
-
 ### 5. sign_transaction
 
 Sign a transaction with the user’s private key.
 
 **Parameters:**
 
-   - `private_key` - String: user’s private key
-   - `transaction` - Transaction: transaction
+- `private_key` - String: user’s private key
+- `transaction` - Transaction: transaction
 
 **Example:**
 
@@ -698,18 +665,17 @@ transaction = aelf.create_transaction(to_address_string, 'GetContractAddressByNa
 transaction = aelf.sign_transaction(private_key, transaction)
 ```
 
-
 ### 6. get_address_from_public_key
 
 Generate an address from a public key.
 
 **Parameters:**
 
-   - `public_key` - bytes: user’s public key
+- `public_key` - bytes: user’s public key
 
 **Returns:**
 
-   - `Address`
+- `Address`
 
 **Example:**
 
@@ -718,18 +684,17 @@ aelf = AElf(url)
 address = aelf.get_address_from_public_key(public_key)
 ```
 
-
 ### 7. get_address_string_from_public_key
 
 Generate an address string from a public key.
 
 **Parameters:**
 
-   - `public_key` - bytes: user’s public key
+- `public_key` - bytes: user’s public key
 
 **Returns:**
 
-   - `String`
+- `String`
 
 **Example:**
 
@@ -738,14 +703,11 @@ aelf = AElf(url)
 address = aelf.get_address_string_from_public_key(public_key)
 ```
 
-
-
 ### 8. get_chain_id
 
-
 **Returns:**
 
-   - `Number`
+- `Number`
 
 **Example:**
 
@@ -756,18 +718,16 @@ chain_id = aelf.get_chain_id()
 print('# get_chain_id', chain_id)
 ```
 
-
-
 ### 9. get_formatted_address
 
 **Parameters:**
 
-   - `address` - Address: address
+- `address` - Address: address
 
 **Returns:**
 
-   - `String`
- 
+- `String`
+
 **Example:**
 
 ```python
@@ -777,7 +737,6 @@ formatted_address = aelf.get_formatted_address(address)
 print('formatted address', formatted_address)
 ```
 
-
 ### 9. is_connected
 
 Check whether the node is connected.
@@ -789,13 +748,10 @@ aelf = AElf(url)
 is_connected = aelf.is_connected()
 ```
 
-
-
 ## Tookkits.py
 
 AElfToolkit Encapsulate AElf and user’s private key. It simplifies the procedures of sending some transactions. You can find it in src/aelf/toolkits.py.
 
-
 ### Create a Toolkit
 
 Create a Toolkit with AElfToolkit.
@@ -811,7 +767,6 @@ private_key = PrivateKey(bytes(bytearray.fromhex(private_key_string)))
 toolkit = AElfToolkit('http://127.0.0.1:8000', private_key)
 ```
 
-
 ### Send a Transaction
 
 Send a CrossChainTransfer transaction using AElfToolkit.
@@ -832,22 +787,19 @@ toolkit = AElfToolkit('http://127.0.0.1:8000', private_key)
 toolkit.cross_chain_transfer(to_address_string, symbol, amount, memo, to_chain_id)
 ```
 
-
-
 ## Requirements
 
 - [Python](https://www.python.org/)
 - [Docker](https://www.docker.com/)
 
-
 ## Support
 
 - [Node](https://hub.docker.com/r/aelf/node)
 
 ## About Contributing
 
-Read out [contributing guide].
+Read out [contributing guide](../../../resources/contribution/index.md).
 
 ## About Version
 
-[https://semver.org/](https://semver.org/)
\ No newline at end of file
+[https://semver.org/](https://semver.org/)
diff --git a/docs/tutorials/developers/javascript-sdk/index.md b/docs/tutorials/developers/javascript-sdk/index.md
index 15916244..f9a7e830 100644
--- a/docs/tutorials/developers/javascript-sdk/index.md
+++ b/docs/tutorials/developers/javascript-sdk/index.md
@@ -829,7 +829,7 @@ To use aelf SDK, you need:
 
 ## About contributing
 
-Read out [contributing guide]
+Read out [contributing guide](../../../resources/contribution/index.md)
 
 ## About Version
 
diff --git a/docs/tutorials/developers/php-sdk/index.md b/docs/tutorials/developers/php-sdk/index.md
index 27ecce18..faac9aba 100644
--- a/docs/tutorials/developers/php-sdk/index.md
+++ b/docs/tutorials/developers/php-sdk/index.md
@@ -8,11 +8,13 @@ image: /img/Logo.aelf.svg
 # aelf-sdk.php - aelf PHP API
 
 ## Introduction
+
 aelf-sdk.php for aelf is similar to web.js for Ethereum. It consists of libraries that enable interaction with a local or remote aelf node via HTTP.
 
 This documentation will guide you through the installation and usage of aelf-sdk.php, with examples included. For more information, visit the [aelf-sdk.php repository](https://github.com/AElfProject/aelf-sdk.php).
 
 ## Adding aelf PHP SDK
+
 To install the library via Composer, run the following commands in your console:
 
 ```sh
@@ -33,6 +35,7 @@ If you cloned the SDK directly, you must install Composer and run it in the root
 ## Examples
 
 ### 1. Create an Instance
+
 Create a new instance of AElf and connect to an AELF chain node. Using this instance, you can call the AElf APIs.
 
 ```php
@@ -44,6 +47,7 @@ $aelf = new AElf($url);
 ```
 
 ### 2. Get a System Contract Address
+
 Get a system contract address. For example, to get the address of `AElf.ContractNames.Token`:
 
 ```php
@@ -61,6 +65,7 @@ $contractAddress = $aelf->GetContractAddressByName($privateKey, $bytes);
 ```
 
 ### 3. Send a Transaction
+
 Get the contract address and then send a transaction.
 
 ```php
@@ -113,7 +118,6 @@ $url = '127.0.0.1:8000';
 $aelf = new AElf($url);
 ```
 
-
 ### 1. Get Chain Status
 
 - **API Path**: `/api/blockChain/chainStatus`
@@ -122,19 +126,18 @@ $aelf = new AElf($url);
 
 - **Returns**:
 
-   - `Array`
-      - `ChainId` - String
-      - `Branches` - Array
-      - `NotLinkedBlocks` - Array
-      - `LongestChainHeight` - Integer
-      - `LongestChainHash` - String
-      - `GenesisBlockHash` - String
-      - `GenesisContractAddress` - String
-      - `LastIrreversibleBlockHash` - String
-      - `LastIrreversibleBlockHeight` - Integer
-      - `BestChainHash` - String
-      - `BestChainHeight` - Integer
-
+  - `Array`
+    - `ChainId` - String
+    - `Branches` - Array
+    - `NotLinkedBlocks` - Array
+    - `LongestChainHeight` - Integer
+    - `LongestChainHash` - String
+    - `GenesisBlockHash` - String
+    - `GenesisContractAddress` - String
+    - `LastIrreversibleBlockHash` - String
+    - `LastIrreversibleBlockHeight` - Integer
+    - `BestChainHash` - String
+    - `BestChainHeight` - Integer
 
 - **Example** :
 
@@ -146,8 +149,6 @@ $chainStatus = $aelf->getChainStatus();
 print_r($chainStatus);
 ```
 
-
-
 ### 2. Get Block Height
 
 - **API Path**: `/api/blockChain/blockHeight`
@@ -165,34 +166,33 @@ $height = $aelf->getBlockHeight();
 print($height);
 ```
 
-
 ### 3. getBlock
 
 - **API Path**: `/api/blockChain/block`
 
-- **Parameters**: 
-
-   - `block_hash` (String)
-   - `include_transactions` (Boolean)
-
-- **Returns**: 
-
-   - `Array`
-      - `BlockHash` - String
-      - `Header` - Array
-         - `PreviousBlockHash` - String
-         - `MerkleTreeRootOfTransactions` - String
-         - `MerkleTreeRootOfWorldState` - String
-         - `Extra` - List
-         - `Height` - Integer
-         - `Time` - String
-         - `ChainId` - String
-         - `Bloom` - String
-         - `SignerPubkey` - String
-      - `Body` - Array
-         - `TransactionsCount` - Integer
-         - `Transactions` - Array
-            - `transactionId` - String
+- **Parameters**:
+
+  - `block_hash` (String)
+  - `include_transactions` (Boolean)
+
+- **Returns**:
+
+  - `Array`
+    - `BlockHash` - String
+    - `Header` - Array
+      - `PreviousBlockHash` - String
+      - `MerkleTreeRootOfTransactions` - String
+      - `MerkleTreeRootOfWorldState` - String
+      - `Extra` - List
+      - `Height` - Integer
+      - `Time` - String
+      - `ChainId` - String
+      - `Bloom` - String
+      - `SignerPubkey` - String
+    - `Body` - Array
+      - `TransactionsCount` - Integer
+      - `Transactions` - Array
+        - `transactionId` - String
 
 - **Example** :
 
@@ -204,35 +204,33 @@ $block2 = $aelf->getBlockByHash($block['BlockHash'], false);
 print_r($block2);
 ```
 
-
 ### 4. Get Block by Height
 
 - **API Path**: `/api/blockChain/blockByHeight`
 
-- **Parameters**: 
-
-   - `block_height` (Number)
-   - `include_transactions` (Boolean)
+- **Parameters**:
 
-- **Returns**: 
+  - `block_height` (Number)
+  - `include_transactions` (Boolean)
 
-   - `Array`
-      - `BlockHash` - String
-      - `Header` - Array
-         - `PreviousBlockHash` - String
-         - `MerkleTreeRootOfTransactions` - String
-         - `MerkleTreeRootOfWorldState` - String
-         - `Extra` - List
-         - `Height` - Integer
-         - `Time` - String
-         - `ChainId` - String
-         - `Bloom` - String
-         - `SignerPubkey` - String
-      - `Body` - Array
-         - `TransactionsCount` - Integer
-         - `Transactions` - Array
-            - `transactionId` - String
+- **Returns**:
 
+  - `Array`
+    - `BlockHash` - String
+    - `Header` - Array
+      - `PreviousBlockHash` - String
+      - `MerkleTreeRootOfTransactions` - String
+      - `MerkleTreeRootOfWorldState` - String
+      - `Extra` - List
+      - `Height` - Integer
+      - `Time` - String
+      - `ChainId` - String
+      - `Bloom` - String
+      - `SignerPubkey` - String
+    - `Body` - Array
+      - `TransactionsCount` - Integer
+      - `Transactions` - Array
+        - `transactionId` - String
 
 - **Example** :
 
@@ -243,38 +241,37 @@ $block = $aelf->getBlockByHeight(1, true);
 print_r($block);
 ```
 
-
 ### 5. Get Transaction Result
 
 - **API Path**: `/api/blockChain/transactionResult`
 
-- **Parameters**: 
+- **Parameters**:
 
-   - `transactionId` (String)
+  - `transactionId` (String)
 
 - **Returns**:
 
-   - `Object`
-      - `TransactionId` - String
-      - `Status` - String
-      - `Logs` - Array
-         - `Address` - String
-         - `Name` - String
-         - `Indexed` - Array
-         - `NonIndexed` - String
-      - `Bloom` - String
-      - `BlockNumber` - Integer
-      - `Transaction` - Array
-         - `From` - String
-         - `To` - String
-         - `RefBlockNumber` - Integer
-         - `RefBlockPrefix` - String
-         - `MethodName` - String
-         - `Params` - json
-         - `Signature` - String
-            - `transactionId` - String
-      - `ReadableReturnValue` - String
-      - `Error` - String
+  - `Object`
+    - `TransactionId` - String
+    - `Status` - String
+    - `Logs` - Array
+      - `Address` - String
+      - `Name` - String
+      - `Indexed` - Array
+      - `NonIndexed` - String
+    - `Bloom` - String
+    - `BlockNumber` - Integer
+    - `Transaction` - Array
+      - `From` - String
+      - `To` - String
+      - `RefBlockNumber` - Integer
+      - `RefBlockPrefix` - String
+      - `MethodName` - String
+      - `Params` - json
+      - `Signature` - String
+        - `transactionId` - String
+    - `ReadableReturnValue` - String
+    - `Error` - String
 
 - **Example** :
 
@@ -286,21 +283,20 @@ $transactionResult = $aelf->getTransactionResult($block['Body']['Transactions'][
 print_r($transactionResult);
 ```
 
-
 ### 6. Get Multiple Transaction Results
 
 - **API Path**: `/api/blockChain/transactionResults`
 
-- **Parameters**: 
+- **Parameters**:
 
-   - `blockHash` (String)
-   - `offset` (Number)
-   - `limit` (Number)
+  - `blockHash` (String)
+  - `offset` (Number)
+  - `limit` (Number)
 
-- **Returns**: 
+- **Returns**:
 
-   - `List` - The array of method descriptions:
-      - the transaction result object
+  - `List` - The array of method descriptions:
+    - the transaction result object
 
 - **Example** :
 
@@ -312,7 +308,6 @@ $transactionResults = $aelf->getTransactionResults($block['Body']);
 print_r($transactionResults);
 ```
 
-
 ### 7. Get Transaction Pool Status
 
 - **API Path**: `/api/blockChain/transactionPoolStatus`
@@ -326,16 +321,15 @@ $status = $aelf->getTransactionPoolStatus();
 print_r($status);
 ```
 
-
 ### 8. Send Transaction
 
 - **API Path**: `/api/blockChain/sendTransaction`
 
 - **Method**: POST
 
-- **Parameters**: 
+- **Parameters**:
 
-   - `transaction` (String)
+  - `transaction` (String)
 
 - **Example** :
 
@@ -348,16 +342,15 @@ $result = $aelf->sendTransaction($executeTransactionDtoObj);
 print_r($result);
 ```
 
-
 ### 9. Send Multiple Transactions
 
 - **API Path**: `/api/blockChain/sendTransactions`
 
 - **Method**:POST
 
-- **Parameters**: 
+- **Parameters**:
 
-   - `transactions` (String)
+  - `transactions` (String)
 
 - **Example** :
 
@@ -376,7 +369,6 @@ $listString = $aelf->sendTransactions($sendTransactionsInputs);
 print_r($listString);
 ```
 
-
 ### 10. Get Peers
 
 - **API Path**: `/api/net/peers`
@@ -387,7 +379,6 @@ print_r($listString);
 print_r($aelf->getPeers(true));
 ```
 
-
 ### 11. Add Peer
 
 - **API Path**: `/api/net/peer`
@@ -396,7 +387,7 @@ print_r($aelf->getPeers(true));
 
 - **Parameters**:
 
-   - `peer_address` (String)
+  - `peer_address` (String)
 
 - **Example** :
 
@@ -404,14 +395,13 @@ print_r($aelf->getPeers(true));
 $aelf->addPeer($url);
 ```
 
-
 ### 12. Remove Peer
 
 - **API Path**: `/api/net/peer`
 
 - **Parameters**:
 
-   - `peer_address` (String)
+  - `peer_address` (String)
 
 - **Example** :
 
@@ -419,21 +409,20 @@ $aelf->addPeer($url);
 $aelf->removePeer($url);
 ```
 
-
 ### 13. Create Raw Transaction
 
 - **API Path**: `/api/blockchain/rawTransaction`
 
 - **Method**: POST
 
-- **Parameters**: 
+- **Parameters**:
 
-   - `transaction` (Array)
+  - `transaction` (Array)
 
-- **Returns**: 
+- **Returns**:
 
-   - `Array`
-      - `RawTransaction` - hex string bytes generated by transaction information
+  - `Array`
+    - `RawTransaction` - hex string bytes generated by transaction information
 
 - **Example** :
 
@@ -455,16 +444,15 @@ $rawTransaction = $aelf->createRawTransaction($transaction);
 print_r($rawTransaction);
 ```
 
-
 ### 14. Send Raw Transaction
 
 - **API Path**: `/api/blockchain/sendRawTransaction`
 
-- **Parameters**: 
+- **Parameters**:
 
-   - `Transaction` (raw transaction)
-   - `Signature` (signature)
-   - `ReturnTransaction` (indicates whether to return transaction)
+  - `Transaction` (raw transaction)
+  - `Signature` (signature)
+  - `ReturnTransaction` (indicates whether to return transaction)
 
 - **Example** :
 
@@ -479,19 +467,16 @@ $execute = $aelf->sendRawTransaction($transaction);
 print_r($execute);
 ```
 
-
-
 ### 15. Execute Raw Transaction
 
 - **API Path**: `/api/blockchain/executeRawTransaction`
 
 - **Method**: POST
 
-- **Parameters**: 
-
-   - `RawTransaction` (raw transaction)
-   - `Signature` (signature)
+- **Parameters**:
 
+  - `RawTransaction` (raw transaction)
+  - `Signature` (signature)
 
 - **Example** :
 
@@ -506,14 +491,13 @@ $execute = $aelf->executeRawTransaction($transaction);
 print_r($execute);
 ```
 
-
 ### 16. Get Merkle Path by Transaction ID
 
 - **API Path**: `/api/blockchain/merklePathByTransactionId`
 
-- **Parameters**: 
+- **Parameters**:
 
-   - `transactionId` (String)
+  - `transactionId` (String)
 
 - **Example** :
 
@@ -525,24 +509,23 @@ $merklePath = $aelf->getMerklePathByTransactionId($block['Body']['Transactions']
 print_r($merklePath);
 ```
 
-
 ### 17. Calculate Transaction Fee
 
 - **API Path**: `/api/blockChain/calculateTransactionFee`
 
 - **Method**: POST
 
-- **Parameters**: 
+- **Parameters**:
 
-   - `CalculateTransactionFeeInput` (Object)
+  - `CalculateTransactionFeeInput` (Object)
 
-- **Returns**: 
+- **Returns**:
 
-   - `CalculateTransactionFeeOutput (Object)`
+  - `CalculateTransactionFeeOutput (Object)`
 
-       - `Success` - bool
-       - `TransactionFee` - Array
-       - `ResourceFee` - Array
+    - `Success` - bool
+    - `TransactionFee` - Array
+    - `ResourceFee` - Array
 
 - **Example** :
 
@@ -556,7 +539,6 @@ $result = $aelf->calculateTransactionFee($calculateTransactionFeeInputParam);
 print_r($result);
 ```
 
-
 ### 18. Get Network Info
 
 - **API Path**: `/api/net/networkInfo`
@@ -569,7 +551,6 @@ $aelf = new AElf($url);
 print_r($aelf->getNetworkInfo());
 ```
 
-
 ### 19. Get Contract File Descriptor Set
 
 - **API Path**: `/api/blockchain/contractFileDescriptorSet`
@@ -587,7 +568,6 @@ foreach ($transactionResultDtoList as $v) {
 }
 ```
 
-
 ### 20. Get Task Queue Status
 
 - **API Path**: `/api/blockchain/taskQueueStatus`
@@ -601,7 +581,6 @@ $taskQueueStatus = $aelf->getTaskQueueStatus();
 print_r($taskQueueStatus);
 ```
 
-
 ### 21. Execute Transaction
 
 - **API Path**: `/api/blockchain/executeTransaction`
@@ -626,8 +605,6 @@ $tokenInfo = new TokenInfo();
 $tokenInfo->mergeFromString(hex2bin($response));
 ```
 
-
-
 ## Other Tool Kit
 
 aelf supplies some APIs to simplify development.
@@ -641,8 +618,7 @@ $chainId = $aelf->getChainId();
 print_r($chainId);
 ```
 
-
-###  2. Generate Transaction
+### 2. Generate Transaction
 
 ```php
 $aelf = new AElf($url);
@@ -652,8 +628,7 @@ $param->setValue('');
 $transaction = $aelf->generateTransaction($fromAddress, $toAddress, $methodName, $param);
 ```
 
-
-###  3. Sign Transaction
+### 3. Sign Transaction
 
 ```php
 $aelf = new AElf($url);
@@ -662,7 +637,6 @@ $transaction = $aelf->generateTransaction($fromAddress, $toAddress, $methodName,
 $signature = $aelf->signTransaction($privateKey, $transaction);
 ```
 
-
 ### 4. Get Genesis Contract Address
 
 ```php
@@ -672,8 +646,8 @@ $genesisContractAddress = $aelf->getGenesisContractAddress();
 print_r($genesisContractAddress);
 ```
 
-
 ### 5. Get Address From PubKey
+
 Calculate the account address according to the public key.
 
 ```php
@@ -683,8 +657,8 @@ $pubKeyAddress = $aelf->getAddressFromPubKey('04166cf4be901dee1c21f3d97b9e4818f2
 print_r($pubKeyAddress);
 ```
 
-
 ### 6. Get Formatted Address
+
 Convert the address to the displayed string: symbol_base58-string_base58-string_chain_id.
 
 ```php
@@ -694,8 +668,8 @@ $addressVal = $aelf->getFormattedAddress($privateKey, $base58Address);
 print_r($addressVal);
 ```
 
-
 ### 7. Generate Key Pair Info
+
 Generate a new key pair using ECDSA.
 
 ```php
@@ -705,8 +679,7 @@ $pairInfo = $aelf->generateKeyPairInfo();
 print_r($pairInfo);
 ```
 
-
-###  8. Get Contract Address By Name
+### 8. Get Contract Address By Name
 
 ```php
 $aelf = new AElf($url);
@@ -717,7 +690,6 @@ $contractAddress = $aelf->GetContractAddressByName($privateKey, $bytes);
 print_r($contractAddress);
 ```
 
-
 ### 9. Get Address From Private Key
 
 ```php
@@ -727,7 +699,6 @@ $address = $aelf->getAddressFromPrivateKey($privateKey);
 print_r($address);
 ```
 
-
 ### 10. Get Signature With Private Key
 
 ```php
@@ -737,7 +708,6 @@ $sign = $aelf->getSignatureWithPrivateKey($privateKey, $transactionId);
 print_r($sign);
 ```
 
-
 ### 11. Is Connected
 
 ```php
@@ -747,11 +717,11 @@ $isConnected = $this->aelf->isConnected();
 print_r($isConnected);
 ```
 
-
 ### 12. Get Transaction Fees
+
 Get the transaction fee from the transaction result.
 
-```php      
+```php
 $aelf = new AElf($url);
 
 $block = $aelf->getBlockByHeight(1, true);
@@ -769,18 +739,14 @@ $aelf = new AElf($url);
 $version = $aelf->version;
 ```
 
-
 ## Requirements
 
 - [**php**](https://php.orgwe67y8re8hufr54ff4ed3ed32ws2d3crf4cfsx2ws2e33333333333333333333333333333333dr34cf4c2q4cfuj7ji8o87hb6fv4d3ed3/)
 
-
-
 ## About contributing
-Read out [contributing guide]
+
+Read out [contributing guide](../../../resources/contribution/index.md)
 
 ## About Version
 
 [https://semver.org/](https://semver.org/)
-
-
diff --git a/docs/tutorials/developers/python-sdk/index.md b/docs/tutorials/developers/python-sdk/index.md
index 6a3b6611..1d09eac0 100644
--- a/docs/tutorials/developers/python-sdk/index.md
+++ b/docs/tutorials/developers/python-sdk/index.md
@@ -29,7 +29,6 @@ from aelf import AElf
 chain = AElf('http://127.0.0.1:8000')
 ```
 
-
 ## Examples
 
 You can find more examples in the `./test` directory of the repository.
@@ -45,7 +44,6 @@ from aelf import AElf
 aelf = AElf('http://127.0.0.1:8000')
 ```
 
-
 ### 2. Get a System Contract Address
 
 To get a system contract address, for example, the `AElf.ContractNames.Token`, use the following code:
@@ -63,7 +61,6 @@ genesis_contract_address = aelf.get_genesis_contract_address_string()
 multi_token_contract_address = aelf.get_system_contract_address('AElf.ContractNames.Token')
 ```
 
-
 ### 3. Send a Transaction
 
 To send a transaction, first get the contract address and then use the following steps:
@@ -93,9 +90,7 @@ aelf.sign_transaction(private_key, transaction)
 aelf.execute_transaction(transaction)
 ```
 
-By following these instructions, you can effectively interact with the aelf blockchain using the `aelf-sdk.py`   library. For more detailed examples and information, please refer to the [aelf-sdk.py repository](https://github.com/AElfProject/aelf-sdk.py).
-
-
+By following these instructions, you can effectively interact with the aelf blockchain using the `aelf-sdk.py` library. For more detailed examples and information, please refer to the [aelf-sdk.py repository](https://github.com/AElfProject/aelf-sdk.py).
 
 ## Web API
 
@@ -105,7 +100,6 @@ For example, if your local address is `http://127.0.0.1:1235`, you can access it
 
 Before using these methods, make sure you have an `AElf` instance. If not, create one as shown below:
 
-
 ```python
 from aelf import AElf
 
@@ -113,28 +107,27 @@ from aelf import AElf
 aelf = AElf('http://127.0.0.1:8000')
 ```
 
-
 ### 1. Get Chain Status
 
 **Web API Path**: `/api/blockChain/chainStatus`
 
 **Parameters**: None
 
-**Returns**: 
+**Returns**:
 
-   - `JSON`
+- `JSON`
 
-      - `ChainId` - String
-      - `Branches` - JSON
-      - `NotLinkedBlocks` - JSON
-      - `LongestChainHeight` - Number
-      - `LongestChainHash` - String
-      - `GenesisBlockHash` - String
-      - `GenesisContractAddress` - String
-      - `LastIrreversibleBlockHash` - String
-      - `LastIrreversibleBlockHeight` - Number
-      - `BestChainHash` - String
-      - `BestChainHeight` - Number
+  - `ChainId` - String
+  - `Branches` - JSON
+  - `NotLinkedBlocks` - JSON
+  - `LongestChainHeight` - Number
+  - `LongestChainHash` - String
+  - `GenesisBlockHash` - String
+  - `GenesisContractAddress` - String
+  - `LastIrreversibleBlockHash` - String
+  - `LastIrreversibleBlockHeight` - Number
+  - `BestChainHash` - String
+  - `BestChainHeight` - Number
 
 **Example**:
 
@@ -144,7 +137,6 @@ chain_status = aelf.get_chain_status()
 print('# get_chain_status', chain_status)
 ```
 
-
 ### 2. Get Block Height
 
 **Web API Path**: `/api/blockChain/blockHeight`
@@ -161,35 +153,34 @@ block_height = aelf.get_block_height()
 print('# get_block_height', block_height)
 ```
 
-
 ### 3. Get Block
 
 **Web API Path**: /api/blockChain/block
 
 **Parameters**: None
 
-   - `block_hash` - String
-   - `include_transactions` - Boolean (true to include transaction IDs list, false otherwise)
-
-**Returns**: 
-
-   - `JSON`
-
-   - `BlockHash` - String
-   - `Header` - JSON
-      - `PreviousBlockHash` - String
-      - `MerkleTreeRootOfTransactions` - String
-      - `MerkleTreeRootOfWorldState` - String
-      - `Extra` - List
-      - `Height` - Number
-      - `Time` - JSON
-      - `ChainId` - String
-      - `Bloom` - String
-      - `SignerPubkey` - String
-   - `Body` - JSON
-      - `TransactionsCount` - Number
-      - `Transactions` - List
-         - `transactionId` - String
+- `block_hash` - String
+- `include_transactions` - Boolean (true to include transaction IDs list, false otherwise)
+
+**Returns**:
+
+- `JSON`
+
+- `BlockHash` - String
+- `Header` - JSON
+  - `PreviousBlockHash` - String
+  - `MerkleTreeRootOfTransactions` - String
+  - `MerkleTreeRootOfWorldState` - String
+  - `Extra` - List
+  - `Height` - Number
+  - `Time` - JSON
+  - `ChainId` - String
+  - `Bloom` - String
+  - `SignerPubkey` - String
+- `Body` - JSON
+  - `TransactionsCount` - Number
+  - `Transactions` - List
+    - `transactionId` - String
 
 **Example**:
 
@@ -199,35 +190,34 @@ block = aelf.get_block(blockHash)
 print('# get_block', block)
 ```
 
-
 ### 4. Get Block by Height
 
 **Web API Path**: /api/blockChain/blockByHeight
 
-**Parameters**: 
-
-   - `block_height` - Number
-   - `include_transactions` - Boolean (true to include transaction IDs list, false otherwise)
-
-**Returns**: 
-
-   - `JSON`
+**Parameters**:
 
-   - `BlockHash` - String
-   - `Header` - JSON
-      - `PreviousBlockHash` - String
-      - `MerkleTreeRootOfTransactions` - String
-      - `MerkleTreeRootOfWorldState` - String
-      - `Extra` - List
-      - `Height` - Number
-      - `Time` - JSON
-      - `ChainId` - String
-      - `Bloom` - String
-      - `SignerPubkey` - String
-   - `Body` - JSON
-      - `TransactionsCount` - Number
-      - `Transactions` - List
-         - `transactionId` - String
+- `block_height` - Number
+- `include_transactions` - Boolean (true to include transaction IDs list, false otherwise)
+
+**Returns**:
+
+- `JSON`
+
+- `BlockHash` - String
+- `Header` - JSON
+  - `PreviousBlockHash` - String
+  - `MerkleTreeRootOfTransactions` - String
+  - `MerkleTreeRootOfWorldState` - String
+  - `Extra` - List
+  - `Height` - Number
+  - `Time` - JSON
+  - `ChainId` - String
+  - `Bloom` - String
+  - `SignerPubkey` - String
+- `Body` - JSON
+  - `TransactionsCount` - Number
+  - `Transactions` - List
+    - `transactionId` - String
 
 **Example**:
 
@@ -237,38 +227,37 @@ block_by_height = aelf.get_block_by_height(12, False)
 print('# get_block_by_height', block_by_height)
 ```
 
-
 ### 5. Get Transaction Result
 
 **Web API Path**: /api/blockChain/transactionResult
 
 **Parameters**:
 
-   - `transactionId` - String
-
-**Returns**: 
-
-   - `JSON`
-
-      - `TransactionId` - String
-      - `Status` - String
-      - `Logs` - List
-         - `Address` - String
-         - `Name` - String
-         - `Indexed` - List
-         - `NonIndexed` - String
-      - `Bloom` - String
-      - `BlockNumber` - Number
-      - `Transaction` - List
-         - `From` - Number
-         - `To` -  Number
-         - `RefBlockNumber` - Number
-         - `RefBlockPrefix` - String
-         - `MethodName` - String
-         - `Params` - JSON
-         - `Signature` - String
-      - `ReadableReturnValue` - JSON
-      - `Error` - String
+- `transactionId` - String
+
+**Returns**:
+
+- `JSON`
+
+  - `TransactionId` - String
+  - `Status` - String
+  - `Logs` - List
+    - `Address` - String
+    - `Name` - String
+    - `Indexed` - List
+    - `NonIndexed` - String
+  - `Bloom` - String
+  - `BlockNumber` - Number
+  - `Transaction` - List
+    - `From` - Number
+    - `To` - Number
+    - `RefBlockNumber` - Number
+    - `RefBlockPrefix` - String
+    - `MethodName` - String
+    - `Params` - JSON
+    - `Signature` - String
+  - `ReadableReturnValue` - JSON
+  - `Error` - String
 
 **Example**:
 
@@ -278,17 +267,15 @@ transaction_result = aelf.get_transaction_result(transactionId)
 print('# get_transaction_result', transaction_result)
 ```
 
-
 ### 6. Get Transaction Results
 
 **Web API Path**: /api/blockChain/transactionResults
 
 **Parameters**:
 
-   - `blockHash` - String
-   - `offset` - Number
-   - `limit` - Number
-
+- `blockHash` - String
+- `offset` - Number
+- `limit` - Number
 
 **Returns**: `List` of transaction result objects
 
@@ -300,8 +287,6 @@ transaction_results = aelf.get_transaction_results(blockHash, 0, 2)
 print('# get_transaction_results', transaction_results)
 ```
 
-
-
 ### 7. Get Transaction Pool Status
 
 **Web API Path**: /api/blockChain/transactionPoolStatus
@@ -314,7 +299,6 @@ tx_pool_status = aelf.get_transaction_pool_status()
 print('# get_transaction_pool_status', tx_pool_status)
 ```
 
-
 ### 8. Send Transaction
 
 **Web API Path**: `/api/blockChain/sendTransaction`
@@ -323,7 +307,7 @@ print('# get_transaction_pool_status', tx_pool_status)
 
 **Parameters**:
 
-   - `transaction` - String (serialized data)
+- `transaction` - String (serialized data)
 
 **Example**:
 
@@ -341,8 +325,6 @@ result = aelf.send_transaction(transaction.SerializePartialToString().hex())
 print('# send_transaction', result)
 ```
 
-
-
 ### 9. Send Transactions
 
 **Web API Path**: `/api/blockChain/sendTransaction`
@@ -351,7 +333,7 @@ print('# send_transaction', result)
 
 **Parameters**:
 
-   - `transactions` - String (serialized data)
+- `transactions` - String (serialized data)
 
 **Example**:
 
@@ -365,7 +347,6 @@ result = aelf.send_transaction(transaction1 + ',' + transaction2)
 print('# send_transactions', result)
 ```
 
-
 ### 10. Get Peers
 
 **Web API Path**: `/api/net/peers`
@@ -378,7 +359,6 @@ peers = aelf.get_peers()
 print('# get_peers', peers)
 ```
 
-
 ### 11. Add Peer
 
 **Web API Path**: `/api/net/peers`
@@ -387,7 +367,7 @@ print('# get_peers', peers)
 
 **Parameters**:
 
-   - `peer_address` - String (peer’s endpoint)
+- `peer_address` - String (peer’s endpoint)
 
 **Example**:
 
@@ -397,8 +377,6 @@ add_peer = aelf.add_peer(endpoint)
 print('# add_peer', add_peer)
 ```
 
-
-
 ### 12. Remove Peer
 
 **Web API Path**: `/api/net/peer?address=`
@@ -407,7 +385,7 @@ print('# add_peer', add_peer)
 
 **Parameters**:
 
-   - `peer_address` - String (peer’s endpoint)
+- `peer_address` - String (peer’s endpoint)
 
 **Example**:
 
@@ -425,12 +403,12 @@ print('# remove_peer', remove_peer)
 
 **Parameters**:
 
-   - `transaction` - JSON format transaction
+- `transaction` - JSON format transaction
 
-**Returns**: 
+**Returns**:
 
-   - `JSON`
-      - `RawTransaction` - hex string bytes generated by transaction information
+- `JSON`
+  - `RawTransaction` - hex string bytes generated by transaction information
 
 **Example**:
 
@@ -448,7 +426,6 @@ raw_transaction = aelf.create_raw_transaction(transaction)
 print('# create_raw_transaction', raw_transaction)
 ```
 
-
 ### 14. Send Raw Transaction
 
 **Web API Path**: `/api/blockchain/sendRawTransaction`
@@ -457,9 +434,9 @@ print('# create_raw_transaction', raw_transaction)
 
 **Parameters**:
 
-   - `Transaction` - raw transaction
-   - `Signature` - signature
-   - `ReturnTransaction` - indicates whether to return the transaction
+- `Transaction` - raw transaction
+- `Signature` - signature
+- `ReturnTransaction` - indicates whether to return the transaction
 
 **Example**:
 
@@ -499,8 +476,8 @@ print('# send_raw_transaction', result)
 
 **Parameters**:
 
-   - `RawTransaction` - raw transaction
-   - `Signature` - signature
+- `RawTransaction` - raw transaction
+- `Signature` - signature
 
 **Example**:
 
@@ -531,7 +508,6 @@ result = aelf.execute_raw_transaction(transaction_1)
 print('# execute_raw_transaction', result)
 ```
 
-
 ### 16. Get Merkle Path
 
 **Web API Path**: `/api/blockchain/merklePathByTransactionId?transactionId=`
@@ -540,7 +516,7 @@ print('# execute_raw_transaction', result)
 
 **Parameters**:
 
-   - `transactionId` - String
+- `transactionId` - String
 
 **Example**:
 
@@ -552,7 +528,6 @@ merkle_path = aelf.get_merkle_path(transaction_id)
 print('# get_merkle_path', merkle_path)
 ```
 
-
 ### 17. Calculate Transaction Fee
 
 **Web API Path**: `/api/blockchain/calculateTransactionFee`
@@ -561,15 +536,15 @@ print('# get_merkle_path', merkle_path)
 
 **Parameters**:
 
-   - `CalculateTransactionFeeInput` - JSON with the following structure:
-      - `RawTransaction` - String
+- `CalculateTransactionFeeInput` - JSON with the following structure:
+  - `RawTransaction` - String
 
-**Returns**: 
+**Returns**:
 
-   - `CalculateTransactionFeeOutput` - `json` - The json with the following structure :
-      - `Success` - Boolean
-      - `TransactionFee` - Array
-      - `ResourceFee` - Array
+- `CalculateTransactionFeeOutput` - `json` - The json with the following structure :
+  - `Success` - Boolean
+  - `TransactionFee` - Array
+  - `ResourceFee` - Array
 
 **Example**:
 
@@ -584,8 +559,6 @@ calculate_transaction_fee_output = aelf.calculate_transaction_fee(calculate_tran
 print('# calculate_transaction_fee', calculate_transaction_fee_output)
 ```
 
-
-
 ### 18. Get Network Info
 
 **Web API Path**: `/api/net/networkInfo`
@@ -601,8 +574,6 @@ network_info = aelf.get_network_info()
 print('# get_network_info', network_info)
 ```
 
-
-
 ## AElf.client
 
 Use the API to see detailed results.
@@ -619,16 +590,15 @@ aelf = AElf(url)
 genesis_contract_address = aelf.get_genesis_contract_address_string()
 ```
 
-
 ### 2. get_system_contract_address
 
 **Parameters:**
 
-   - `contract_name` - String: system contract’s name
+- `contract_name` - String: system contract’s name
 
 **Returns:**
 
-   - `Address`: system contract’s address
+- `Address`: system contract’s address
 
 **Example:**
 
@@ -638,16 +608,15 @@ aelf = AElf(url)
 multi_token_contract_address = aelf.get_system_contract_address('AElf.ContractNames.Token')
 ```
 
-
 ### 3. get_system_contract_address_string
 
 **Parameters:**
 
-   - `contract_name` - String: system contract’s name
+- `contract_name` - String: system contract’s name
 
 **Returns:**
 
-   - `String`: system contract’s address
+- `String`: system contract’s address
 
 **Example:**
 
@@ -657,14 +626,13 @@ aelf = AElf(url)
 multi_token_contract_address_string = aelf.get_system_contract_address_string('AElf.ContractNames.Token')
 ```
 
-
 ### 4. create_transaction
 
 **Parameters:**
 
-   - `to_address` - Address or String: target contract’s address
-   - `method_name` - String: method name
-   - `params` - String: serialize parameters into String
+- `to_address` - Address or String: target contract’s address
+- `method_name` - String: method name
+- `params` - String: serialize parameters into String
 
 **Example:**
 
@@ -676,15 +644,14 @@ params.value = hashlib.sha256(contract_name.encode('utf8')).digest()
 transaction = aelf.create_transaction(genesisContractAddress, 'GetContractAddressByName', params.SerializeToString())
 ```
 
-
 ### 5. sign_transaction
 
 Sign a transaction with the user’s private key.
 
 **Parameters:**
 
-   - `private_key` - String: user’s private key
-   - `transaction` - Transaction: transaction
+- `private_key` - String: user’s private key
+- `transaction` - Transaction: transaction
 
 **Example:**
 
@@ -698,18 +665,17 @@ transaction = aelf.create_transaction(to_address_string, 'GetContractAddressByNa
 transaction = aelf.sign_transaction(private_key, transaction)
 ```
 
-
 ### 6. get_address_from_public_key
 
 Generate an address from a public key.
 
 **Parameters:**
 
-   - `public_key` - bytes: user’s public key
+- `public_key` - bytes: user’s public key
 
 **Returns:**
 
-   - `Address`
+- `Address`
 
 **Example:**
 
@@ -718,18 +684,17 @@ aelf = AElf(url)
 address = aelf.get_address_from_public_key(public_key)
 ```
 
-
 ### 7. get_address_string_from_public_key
 
 Generate an address string from a public key.
 
 **Parameters:**
 
-   - `public_key` - bytes: user’s public key
+- `public_key` - bytes: user’s public key
 
 **Returns:**
 
-   - `String`
+- `String`
 
 **Example:**
 
@@ -738,14 +703,11 @@ aelf = AElf(url)
 address = aelf.get_address_string_from_public_key(public_key)
 ```
 
-
-
 ### 8. get_chain_id
 
-
 **Returns:**
 
-   - `Number`
+- `Number`
 
 **Example:**
 
@@ -756,18 +718,16 @@ chain_id = aelf.get_chain_id()
 print('# get_chain_id', chain_id)
 ```
 
-
-
 ### 9. get_formatted_address
 
 **Parameters:**
 
-   - `address` - Address: address
+- `address` - Address: address
 
 **Returns:**
 
-   - `String`
- 
+- `String`
+
 **Example:**
 
 ```python
@@ -777,7 +737,6 @@ formatted_address = aelf.get_formatted_address(address)
 print('formatted address', formatted_address)
 ```
 
-
 ### 9. is_connected
 
 Check whether the node is connected.
@@ -789,13 +748,10 @@ aelf = AElf(url)
 is_connected = aelf.is_connected()
 ```
 
-
-
 ## Tookkits.py
 
 AElfToolkit Encapsulate AElf and user’s private key. It simplifies the procedures of sending some transactions. You can find it in src/aelf/toolkits.py.
 
-
 ### Create a Toolkit
 
 Create a Toolkit with AElfToolkit.
@@ -811,7 +767,6 @@ private_key = PrivateKey(bytes(bytearray.fromhex(private_key_string)))
 toolkit = AElfToolkit('http://127.0.0.1:8000', private_key)
 ```
 
-
 ### Send a Transaction
 
 Send a CrossChainTransfer transaction using AElfToolkit.
@@ -832,22 +787,19 @@ toolkit = AElfToolkit('http://127.0.0.1:8000', private_key)
 toolkit.cross_chain_transfer(to_address_string, symbol, amount, memo, to_chain_id)
 ```
 
-
-
 ## Requirements
 
 - [Python](https://www.python.org/)
 - [Docker](https://www.docker.com/)
 
-
 ## Support
 
 - [Node](https://hub.docker.com/r/aelf/node)
 
 ## About Contributing
 
-Read out [contributing guide].
+Read out [contributing guide](../../../resources/contribution/index.md)
 
 ## About Version
 
-[https://semver.org/](https://semver.org/)
\ No newline at end of file
+[https://semver.org/](https://semver.org/)