diff --git a/README.md b/README.md
index c9baf3a1b5bd24bfa1f99fe6f21bc6414eeea7c1..a94d510e741f1147c0f05d83319e6196e53cd6ba 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@ Apache Dubbo Go Implementation.
 Apache License, Version 2.0
 
 ## Code design ##
-Based on dubbo's layered code design (protocol layer,registry layer,cluster layer,config layer and so on), you can achieve your needs by extending these layered interfaces instead of modifying go-for-apache-dubbo's source code. And welcome to contribute your awesome extension.
+Based on dubbo's layered code design (protocol layer,registry layer,cluster layer,config layer and so on), you can achieve your needs by invoking 'extension.SetXXX' to extend these layered interfaces instead of modifying go-for-apache-dubbo's source code. And welcome to contribute your awesome extension.
 
 About detail design please refer to [code layered design](https://github.com/dubbo/go-for-apache-dubbo/wiki/dubbo-go-V2.6-design)
 ## Feature list ##