update README.md.

README.md

@@ -55,24 +55,8 @@ Ajplus Captcha , an open source toolset for users,its main Features are as follo
 ![Sequence Diagram](https://captcha.anji-plus.com/static/shixu.png "时序图")
 
 # 4. SourceCode Structure
-├─core
-│ ├─captcha         captcha core libary 
-│ └─captcha-spring-boot-starter          springboot starter
-├─images             images
-├─service
-│ ├─springboot         demo service for springboot
-│ └─springmvc          demo service springmvc
-└─view             client componets
- ├─android          android demo
- ├─angular          angular demo
- ├─flutter          flutter demo
- ├─html          html demo
- ├─ios          ios demo
- ├─php          php demo
- ├─react-native          react-native demo
- ├─uni-app          uni-app
- └─vue          vue demo
- 
+
+![输入图片说明](https://images.gitee.com/uploads/images/2021/0207/112335_bd789fff_1600789.png "屏幕截图.png")
 
 # 5. Dev & Run 
 ####