diff --git a/src/main/java/com/github/yulichang/common/README.md b/src/main/java/com/github/yulichang/common/README.md
index 65825d5..1a7ab49 100644
--- a/src/main/java/com/github/yulichang/common/README.md
+++ b/src/main/java/com/github/yulichang/common/README.md
@@ -1,5 +1,7 @@
 ## 连表通用wrapper
 
+[官方自定义sql](https://mp.baomidou.com/guide/wrapper.html#%E4%BD%BF%E7%94%A8-wrapper-%E8%87%AA%E5%AE%9A%E4%B9%89sql)
+
 ### 使用方法
 
 #### 如需单独使用 请拷贝以下6个类