diff --git a/zh-cn/application-dev/reference/apis/js-apis-device-manager.md b/zh-cn/application-dev/reference/apis/js-apis-device-manager.md
index 6bbbb9864ffb82d3cc31b0638768b981ad6330c2..539885ac81c975ed110d8242942eff8da557f495 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-device-manager.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-device-manager.md
@@ -406,7 +406,7 @@ startDeviceDiscovery(subscribeInfo: SubscribeInfo, filterOptions: string): void
             "value": 50 // 需过滤发现设备的距离，单位(cm)
         }
     ]
-};
+  };
   dmInstance.startDeviceDiscovery(subscribeInfo, JSON.stringify(filterOptions)); //当有设备发现时，通过deviceFound回调通知给应用程序
   ```