diff --git a/README.md b/README.md
index 4eea846..8eff903 100644
--- a/README.md
+++ b/README.md
@@ -1,34 +1,19 @@
-# piipcam
+# XiaoPi
+Make your Raspberry Pi Zero W as a home security camera.
 
-Make your Raspberry Pi Zero W as a 1080P IP Camera. 
+### How to Use
+If you just want to use camera functions without development, please check out the [wiki](https://github.com/sepfy/xiaopi/wiki) for more details.
 
-### Prepare
-Connect your Raspberry Pi Zero W with a camera.
-![hw](https://github.com/sepfy/readme-image/blob/main/IMG_20201101_183305.jpg)
+### How to Develop
+XiaoPi is be constructed by Yocto project. Compile whole prject by following instructions
+```bash
+git clone --recursive https://github.com/sepfy/xiaopi
+cd xiaopi
+source init-build-env.sh
+bitbake xiaopi
+```
+It will take a few hours to build OS image. After building, you can find the OS image in tmp/deplay/images/raspberrypi0-wifi
 
-### Installation
 
-Download and install image to your SD card. The procedures are same as [Raspberry Pi standard image](https://www.raspberrypi.org/downloads/).
-
-Date | Image | Size | md5sum
----- | ---- | ---- | ----- 
-2020-10-25 | [piipcam-raspberrypi0-wifi-20201025115230.rootfs.rpi-sdimg.zip](https://drive.google.com/file/d/1HjRGvfZ9ICKcg_ABvFLTY7WV570TCOGg/view?usp=sharing) | 63MB | 6791270c8d81c486e420c0f52102bde4
-
-
-### Evaluation
-1. Insert SD card and power on Raspberry Pi Zero.
-2. Connect your PC Wi-Fi to Raspberry Pi Zero's Wi-FI hotspot. The default SSID/password is piipcam/12345678
-![wifi](https://github.com/sepfy/readme-image/blob/main/Screen%20Shot%202020-11-01%20at%206.29.49%20PM.png)
-3. Open VLC player and enter the network source "rtsp://192.168.1.6:8554/live".
-![rtsp](https://github.com/sepfy/readme-image/blob/main/Screen%20Shot%202020-11-01%20at%206.47.59%20PM.png)
-4. Click "Open". You will see the real-time camera image.
-![preview](https://github.com/sepfy/readme-image/blob/main/Screen%20Shot%202020-11-01%20at%207.01.40%20PM.png)
-
-### Others
-Improve latancy: Open preferences of VLC. Find the Network caching in "Show All" -> "Inputs/Codecs". Change the value to 100. The latency of streaming will less than 500 ms.
-
-![step1](https://github.com/sepfy/readme-image/blob/main/Screen%20Shot%202020-11-01%20at%206.49.03%20PM.png)
-![step2](https://github.com/sepfy/readme-image/blob/main/Screen%20Shot%202020-11-01%20at%206.49.18%20PM.png)
-![step3](https://github.com/sepfy/readme-image/blob/main/Screen%20Shot%202020-11-01%20at%206.49.59%20PM.png)