diff --git a/zh-cn/application-dev/reference/apis/js-apis-distributed-data.md b/zh-cn/application-dev/reference/apis/js-apis-distributed-data.md
index 81f7759e3d366fe056e99c7e87e4957e831261cd..df834dddcca95d853221711878b045e13c46c8a0 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-distributed-data.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-distributed-data.md
@@ -2263,10 +2263,10 @@ on(event: 'syncComplete', syncCallback: Callback<Array<[string, number]&gt
 
 **示例**
 
-```
+```js
 let kvStore;
 kvStore.on('syncComplete', function (data) {
-    console.log("syncComplete callback call data: " + data);
+    console.log("callback call data: " + data);
 });
 ```
 
@@ -2290,10 +2290,10 @@ off(event:'dataChange', observer?: Callback<ChangeNotification>): void
 ```js
 let kvStore;
 kvStore.on('dataChange', function (data) {
-    console.log("syncComplete callback call data: " + data);
+    console.log("callback call data: " + data);
 });
 kvStore.off('dataChange', function (data) {
-    console.log("syncComplete callback call data: " + data);
+    console.log("callback call data: " + data);
 });
 ```