diff --git a/en/application-dev/reference/apis/js-apis-hitracechain.md b/en/application-dev/reference/apis/js-apis-hitracechain.md
index 3b90d20a1ea1199ba2da94d3e600d1bf6c9b2e5f..485eddc0fbfb59946228e859760885ad0ce1b633 100644
--- a/en/application-dev/reference/apis/js-apis-hitracechain.md
+++ b/en/application-dev/reference/apis/js-apis-hitracechain.md
@@ -155,6 +155,7 @@ Sets a trace ID. This API works in synchronous manner.
 **Example**
 
 ```js
+let asyncTraceId;
 let traceId = hiTraceChain.begin("business");
 // Set the current trace ID after the service logic is executed for several times.
 hiTraceChain.setId(asyncTraceId);
@@ -297,7 +298,7 @@ Enables the specified trace flag in the **HiTraceId** instance. This API works i
 
 ```js
 let asyncTraceId = hiTraceChain.begin("business", hiTraceChain.HiTraceFlag.INCLUDE_ASYNC);
-hiTraceChain.enable(asyncTraceId, hiTraceChain.HiTraceFlag.DONOT_CREATE_SPAN);
+hiTraceChain.enableFlag(asyncTraceId, hiTraceChain.HiTraceFlag.DONOT_CREATE_SPAN);
 // The value of enabledDoNotCreateSpanFlag is true.
 let enabledDoNotCreateSpanFlag = hiTraceChain.isFlagEnabled(asyncTraceId, hiTraceChain.HiTraceFlag.DONOT_CREATE_SPAN);
-```
\ No newline at end of file
+```
diff --git a/en/application-dev/reference/apis/js-apis-hitracemeter.md b/en/application-dev/reference/apis/js-apis-hitracemeter.md
index c77e4f8125228ec96fdc602e9d781fbff863a894..656063edf90a71a74e8f7b5e90375acfccfdae9c 100644
--- a/en/application-dev/reference/apis/js-apis-hitracemeter.md
+++ b/en/application-dev/reference/apis/js-apis-hitracemeter.md
@@ -34,7 +34,6 @@ If the trace tasks with the same name are not performed at the same time, the sa
 
 ```js
 hiTraceMeter.startTrace("myTestFunc", 1);
-hiTraceMeter.startTrace("myTestFunc", 1, 5); // The expected duration of the trace task is 5 ms.
 ```
 
 
diff --git a/zh-cn/application-dev/reference/apis/js-apis-hitracechain.md b/zh-cn/application-dev/reference/apis/js-apis-hitracechain.md
index 3b91f99086628744c56eb036bbf22d24fa46c3c8..7cb6da52a058023bfb4b92e7ed24f8252bcfc6fa 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-hitracechain.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-hitracechain.md
@@ -155,6 +155,7 @@ setId(id: HiTraceId): void
 **示例：**
 
 ```js
+let asyncTraceId;
 let traceId = hiTraceChain.begin("business");
 // 若干业务逻辑完成后，设置当前HiTraceId。
 hiTraceChain.setId(asyncTraceId);
@@ -297,7 +298,7 @@ enableFlag(id: HiTraceId, flag: HiTraceFlag): void
 
 ```js
 let asyncTraceId = hiTraceChain.begin("business", hiTraceChain.HiTraceFlag.INCLUDE_ASYNC);
-hiTraceChain.enable(asyncTraceId, hiTraceChain.HiTraceFlag.DONOT_CREATE_SPAN);
+hiTraceChain.enableFlag(asyncTraceId, hiTraceChain.HiTraceFlag.DONOT_CREATE_SPAN);
 // enabledDoNotCreateSpanFlag为true
 let enabledDoNotCreateSpanFlag = hiTraceChain.isFlagEnabled(asyncTraceId, hiTraceChain.HiTraceFlag.DONOT_CREATE_SPAN);
 ```
diff --git a/zh-cn/application-dev/reference/apis/js-apis-hitracemeter.md b/zh-cn/application-dev/reference/apis/js-apis-hitracemeter.md
index 5b6f314e87006c3bffdfa1c14184a5d4d099a530..14c49f64cd2180a71a90c274a9d71c7e17f5ed6b 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-hitracemeter.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-hitracemeter.md
@@ -34,7 +34,6 @@ startTrace(name: string, taskId: number): void
 
 ```js
 hiTraceMeter.startTrace("myTestFunc", 1);
-hiTraceMeter.startTrace("myTestFunc", 1, 5); //从startTrace到finishTrace流程的耗时期望为5ms
 ```