update docs

Signed-off-by: Nshawn_he <shawn.he@huawei.com>

en/application-dev/reference/apis/js-apis-power.md

@@ -12,7 +12,7 @@ The Power Manager module provides APIs for rebooting and shutting down the syste
 import power from '@ohos.power';
 ```
 
-## System Capabilities
+## System Capability
 
 SystemCapability.PowerManager.PowerManager.Core
 
@@ -25,7 +25,7 @@ Shuts down the system.
 
 This is a system API and cannot be called by third-party applications.
 
-**Required permission:** ohos.permission.SHUTDOWN
+**Required permission**: ohos.permission.REBOOT
 
 **Parameters**
 
@@ -45,9 +45,9 @@ console.info('power_shutdown_device_test success')
 
 rebootDevice(reason: string): void
 
-Restarts the device.
+Reboots the system.
 
-**Required permission:** ohos.permission.REBOOT (to reboot) or ohos.permission.REBOOT_UPDATER (to reboot and enter the updater mode)
+**Required permission**: ohos.permission.REBOOT (to reboot) or ohos.permission.REBOOT_RECOVERY (to reboot and enter the recovery or updater mode)
 
 **Parameters**
 
@@ -71,7 +71,7 @@ Checks the screen status of the current device.
 
 **Parameters**
 
-| Name   | Type                          | Mandatory  | Description                                      |
+| Name     | Type                          | Mandatory  | Description                                      |
 | -------- | ---------------------------- | ---- | ---------------------------------------- |
 | callback | AsyncCallback&lt;boolean&gt; | Yes   | Callback used to obtain the return value.<br>Return value: The value **true** indicates that the screen is on, and the value **false** indicates the opposite.|
 
@@ -94,10 +94,10 @@ isScreenOn(): Promise&lt;boolean&gt;
 
 Checks the screen status of the current device.
 
-**Return Value**
+**Return value**
 | Type                    | Description                                     |
 | ---------------------- | --------------------------------------- |
-| Promise&lt;boolean&gt; | Promise used to asynchronously obtain the return value. <br/>Return value: The value **true** indicates that the screen is on, and the value **false** indicates the opposite.|
+| Promise&lt;boolean&gt; | Promise used to obtain the return value. <br/>Return value: The value **true** indicates that the screen is on, and the value **false** indicates the opposite.|
 
 **Example**
 

en/application-dev/reference/apis/js-apis-runninglock.md

@@ -107,16 +107,16 @@ Creates a **RunningLock** object.
 **Example**
 
 ```
-runningLock.createRunningLock("running_lock_test", runningLock.RunningLockType.BACKGROUND)
-.then(runninglock => {
-    var used = runninglock.isUsed();
-    console.info('runninglock is used: ' + used);
-    runninglock.lock(500);
-    used = runninglock.isUsed();
-    console.info('after lock runninglock is used ' + used);
-})
-.catch(error => {
-    console.log('create runningLock test error: ' + error);
+runningLock.createRunningLock("running_lock_test", runningLock.RunningLockType.BACKGROUND, (error, lockIns) => {
+    if (typeof error === "undefined") {
+        console.log('create runningLock test error: ' + error);
+    } else {
+        var used = lockIns.isUsed();
+        console.info('runninglock is used: ' + used);
+        lockIns.lock(500);
+        used = lockIns.isUsed();
+        console.info('after lock runninglock is used ' + used);
+    }
 })
 ```
 
@@ -170,11 +170,13 @@ Locks and holds a **RunningLock** object.
 
 **System capability:** SystemCapability.PowerManager.PowerManager.Core
 
+**Required permission:** ohos.permission.RUNNING_LOCK
+
 **Parameters**
 
-| Name    | Type    | Mandatory  | Description                  |
-| ------- | ------ | ---- | -------------------- |
-| timeout | number | No   | Duration for locking and holding the **RunningLock** object.|
+| Name    | Type    | Mandatory  | Description                        |
+| ------- | ------ | ---- | -------------------------- |
+| timeout | number | No   | Duration for locking and holding the **RunningLock** object, in ms.|
 
 **Example**
 
@@ -185,7 +187,7 @@ runningLock.createRunningLock("running_lock_test", runningLock.RunningLockType.B
     console.info('create runningLock success')
 })
 .catch(error => {
-    console.log('Lock runningLock test error: ' + error)
+    console.log('create runningLock test error: ' + error)
 });
 ```
 
@@ -198,16 +200,18 @@ Releases a **Runninglock** object.
 
 **System capability:** SystemCapability.PowerManager.PowerManager.Core
 
+**Required permission:** ohos.permission.RUNNING_LOCK
+
 **Example**
 
 ```
 runningLock.createRunningLock("running_lock_test", runningLock.RunningLockType.BACKGROUND)
 .then(runningLock => {
     runningLock.unlock()
-    console.info('unLock runningLock success')
+    console.info('create and unLock runningLock success')
 })
 .catch(error => {
-    console.log('unLock runningLock test error: ' + error)
+    console.log('create runningLock test error: ' + error)
 });
 ```