diff --git a/zh-cn/application-dev/reference/apis/js-apis-deviceUsageStatistics.md b/zh-cn/application-dev/reference/apis/js-apis-deviceUsageStatistics.md
index 2a292d2a4f1d82d9d7322e368a58a7f5d2f51f8e..113d782651b6a772ab9a10582e18d4a7ea174ecb 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-deviceUsageStatistics.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-deviceUsageStatistics.md
@@ -314,7 +314,7 @@ queryBundleActiveStates(begin: number, end: number, callback: AsyncCallback<A
 
   ```
     bundleState.queryBundleActiveStates(0, 20000000000000, (err, res) => {
-        if(err) {
+        if (err) {
             console.log('BUNDLE_ACTIVE queryBundleActiveStates callback failed, because: ' + err.code);
         } else {
             console.log('BUNDLE_ACTIVE queryBundleActiveStates callback success.');