diff --git a/zh-cn/application-dev/application-models/serviceextensionability.md b/zh-cn/application-dev/application-models/serviceextensionability.md
index cbf921ff14d843af07c50184d57e7e27158e670c..86261d4de84e9777bb34443076d277385393bf34 100644
--- a/zh-cn/application-dev/application-models/serviceextensionability.md
+++ b/zh-cn/application-dev/application-models/serviceextensionability.md
@@ -453,6 +453,8 @@ ServiceExtensionAbility服务组件在[onConnect()](../reference/apis/js-apis-ap
 
 针对ServiceExtensionAbility开发，有以下相关实例可供参考：
 
+- [跨任务链返回（ArkTS）（Full SDK）（API9）](https://gitee.com/openharmony/applications_app_samples/tree/OpenHarmony-4.0-Beta2/code/SystemFeature/ApplicationModels/TestRely/LauncherTest/CrossChainBack)
+
 - [Ability与ServiceExtensionAbility通信（ArkTS）（Full SDK）（API9）](https://gitee.com/openharmony/applications_app_samples/tree/OpenHarmony-4.0-Beta2/code/BasicFeature/IDL/AbilityConnectServiceExtension)
 
 - [Stage模型（ArkTS）（Full SDK）（API10）](https://gitee.com/openharmony/applications_app_samples/tree/OpenHarmony-4.0-Beta2/code/BasicFeature/ApplicationModels/StageModel)