doc

README_zh-CN.md

@@ -9,7 +9,7 @@
   <!-- License -->
   <a href="./LICENSE">
     <img src="https://img.shields.io/github/license/Byaidu/PDFMathTranslate"/></a>
-  <a href="https://t.me/+kXx8BQCnUTc3NDM9">
+  <a href="https://t.me/+Z9_SgnxmsmA5NzBl">
     <img src="https://img.shields.io/badge/Telegram-2CA5E0?style=flat-squeare&logo=telegram&logoColor=white"/></a>
 </p>