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 a6f6fa765108af8a4db7b5b195fbe0bd9f678654..4e0f3581eca544513c0200eb1274d678a24967f3 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
@@ -294,15 +294,11 @@ getTrustedDeviceList(): Promise<Array<DeviceInfo>>
 
 - 示例：
   ```js
-  try {
-    dmInstance.getTrustedDeviceList().then((data) => {
-      console.log('get trusted device info: ' + JSON.stringify(data));
-      }).catch((err) => {
-        console.error("getTrustedDeviceList errCode:" + err.code + ",errMessage:" + err.message);
-    });
-  } catch (err) {
+  dmInstance.getTrustedDeviceList().then((data) => {
+    console.log('get trusted device info: ' + JSON.stringify(data));
+    }).catch((err) => {
       console.error("getTrustedDeviceList errCode:" + err.code + ",errMessage:" + err.message);
-  }
+  });
   ```
 
 ### getLocalDeviceInfoSync<sup>8+</sup>
@@ -371,15 +367,11 @@ getLocalDeviceInfo(): Promise&lt;DeviceInfo&gt;
 
 - 示例：
   ```js
-  try {
-    dmInstance.getLocalDeviceInfo().then((data) => {
-      console.log('get local device info: ' + JSON.stringify(data));
-    }).catch((err) => {
-      console.error("getLocalDeviceInfo errCode:" + err.code + ",errMessage:" + err.message);
-    });
-  } catch (err) {
+  dmInstance.getLocalDeviceInfo().then((data) => {
+    console.log('get local device info: ' + JSON.stringify(data));
+  }).catch((err) => {
     console.error("getLocalDeviceInfo errCode:" + err.code + ",errMessage:" + err.message);
-  }
+  });
   ```
 
 ### startDeviceDiscovery8+</sup>