diff --git a/README_CN.md b/README_CN.md
index bf5d4c9669655459b1af0934b5135a2a66919dc8..63d655f2a471eff547475a3806befff3b141b294 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -26,7 +26,7 @@
 
 # 文档
 
-[详细文档 https://bitlap.org/zh-CN/lab/smt](https://bitlap.org/zh-CN/lab/smt)
+[详细文档 https://bitlap.org/lab/smt](https://bitlap.org/lab/smt)
 
 # 如何使用