diff --git a/docs/extension.md b/docs/extension.md
index d01e6c6c790..303342615e5 100644
--- a/docs/extension.md
+++ b/docs/extension.md
@@ -104,4 +104,8 @@ into its runtime environment.
 ## Down lifecycle
 
 `down` lifecycle is equivalent to `up` with the `<provider> compose --project-name <NAME> down <SERVICE>` command.
-The provider is responsible for releasing all resources associated with the service. 
\ No newline at end of file
+The provider is responsible for releasing all resources associated with the service. 
+
+## Examples
+
+* [API Testing](https://github.com/LinuxSuRen/api-testing/blob/master/cmd/compose.go)