doc: update for using project.

README.md

@@ -26,7 +26,7 @@ I organized my thoughts into a blog: [STEP and IGES models are converted to the
 **Project status:** stable
 
 
-## Mission
+## Features
 
 - [x] Basic project structure planning and interface design
 - [x] Conversion and compression code implementation
@@ -38,7 +38,15 @@ I organized my thoughts into a blog: [STEP and IGES models are converted to the
 - [ ] [bug] stp convert to gltf is too large
 - [x] grpc support
 - [ ] rpc should response error detail
-- [ ] rpc docker server logs output problems
+- [ ] rpc api should support no draco
+- [ ] [bug] rpc docker server logs output problems
+
+
+## Using this project
+
+- Lexcent 3D Printing
+  > You can scan this following qrcode by Wechat, it's helpful for 3d printing and preview everywhere.
+  ![img](./assets/using/lixian.jpg)
 
 ## Version update
 

README_ZH.md

@@ -37,6 +37,13 @@
 - [ ] rpc 接口优化，返回具体的错误信息
 - [ ] rpc server 日志问题
 
+
+## 项目用户
+
+- 立现超级制造
+  > 请用微信扫码，该小程序可用于预览微信聊天中的模型文件以及模型转换
+  ![img](./assets/using/lixian.jpg)
+
 ## 版本说明
 
 ##### v1.4 2021-06-11 17:20