Update README-cn.md

NaBian · web-flow · commit c209cb4df443 · 2021-05-25T17:12:32.000+08:00
diff --git a/README-cn.md b/README-cn.md
@@ -29,6 +29,12 @@
     </a> 
 </p>
 
+## 特别声明
+
+HandyControl 项目已加入 [dotNET China](https://gitee.com/dotnetchina)  组织。<br/>
+
+![dotnetchina](https://images.gitee.com/uploads/images/2021/0324/120117_2da9922c_416720.png "132645_21007ea0_974299.png")
+
 ## 面向中国
 
 ### 码云
