Add Telegram in README_zh_CN.md

(cherry picked from commit 8a188a37c9)

README_zh_CN.md

@@ -10,12 +10,12 @@
 
 on Desktop:
 <p style="text-align: center;">
-    <img src="snapshots/desktop.gif">
+    <img alt="desktop" src="snapshots/desktop.gif">
 </p>
 
 on Mobile:
 <p style="text-align: center;">
-    <img src="snapshots/mobile.gif">
+    <img alt="mobile" src="snapshots/mobile.gif">
 </p>
 
 ## Features
@@ -28,6 +28,10 @@ on Mobile:
 
 ✨ 支持一键导入订阅, 深色模式
 
+## Contact
+
+[Telegram](https://t.me/+G-veVtwBOl4wODc1)
+
 ## Build
 
 1. 更新 submodules