update docs

Signed-off-by: NAnnie_wang <annie.wangli@huawei.com>

en/application-dev/reference/apis/js-apis-system-bluetooth.md

+# Bluetooth
+
+
+> ![icon-note.gif](public_sys-resources/icon-note.gif) **NOTE**<br/>
+>
+> - The APIs of this module are no longer maintained since API version 7. You are advised to use [`@ohos.bluetooth`](js-apis-bluetooth.md).
+>
+> - The initial APIs of this module are supported since API version 6. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+
+
+## Modules to Import
+
+
+```
+import bluetooth from '@system.bluetooth';
+```
+
+
+## bluetooth.startBLEScan(OBJECT)
+
+Scans for Bluetooth Low Energy (BLE) devices nearby. This operation consumes system resources. Call [bluetooth.stopBLEScan](#bluetoothstopblescanobject) to stop the scan after a BLE device is detected and connected.
+
+**Required permissions**: ohos.permission.DISCOVER_BLUETOOTH and ohos.permission.LOCATION
+
+**System capability**: SystemCapability.Communication.Bluetooth.Lite
+
+**Parameters**
+**Table 1** StartBLEScanOptions
+
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| interval | number | No| Interval for reporting device information, in milliseconds. The default value is **0**, which means to report the detected device immediately and report other information at the given interval.|
+| success | Function | No| Called when the operation is successful.|
+| fail | Function | No| Called when the operation fails.|
+| complete | Function | No| Called when the execution is complete.|
+
+**Example**
+
+  ```
+  bluetooth.startBLEScan({
+    success() {
+      console.log('call bluetooth.startBLEScan success.');
+    },
+    fail(code, data) {
+      console.log('call bluetooth.startBLEScan failed, code: ${code}, data: ${data}.');
+    },
+    complete() {
+      console.log('call bluetooth.startBLEScan complete.');
+    }
+  });
+  ```
+
+
+## bluetooth.stopBLEScan(OBJECT)
+
+Stops scanning for BLE devices nearby. This API is used with [bluetooth.startBLEScan(OBJECT)](#bluetoothstartblescanobject) in pairs.
+
+**Required permissions**: ohos.permission.DISCOVER_BLUETOOTH and ohos.permission.LOCATION
+
+**System capability**: SystemCapability.Communication.Bluetooth.Lite
+
+**Parameters**
+**Table 2** StopBLEScanOptions
+
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| success | Function | No| Called when the operation is successful.|
+| fail | Function | No| Called when the operation fails.|
+| complete | Function | No| Called when the execution is complete.|
+
+**Example**
+
+  ```
+  bluetooth.stopBLEScan({
+    success() {
+      console.log('call bluetooth.stopBLEScan success.');
+    },
+    fail(data, code) {
+      console.log('call bluethooth.stopBLEScan fail, code: ${code}, data: ${data}.');
+    },
+    complete() {
+      console.log('call bluethooth.stopBLEScan complete.');
+    }
+  });
+  ```
+
+
+## bluetooth.subscribeBLEFound(OBJECT)
+
+Subscribes to the newly detected BLE device. If this API is called multiple times, the last call takes effect.
+
+**Required permissions**: ohos.permission.DISCOVER_BLUETOOTH and ohos.permission.LOCATION
+
+**System capability**: SystemCapability.Communication.Bluetooth.Lite
+
+**Parameters**
+**Table 3** SubscribeBLEFoundOptions
+
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| success | Function | Yes| Called to report the newly detected device.|
+| fail | Function | No| Called when the operation fails.|
+
+**Table 4** Return value in success
+
+| Name| Type| Description|
+| -------- | -------- | -------- |
+| devices | Array&lt;BluetoothDevice&gt; | List of the newly detected BLE devices.|
+
+**Table 5** BluethoothDevice
+
+| Name| Type| Description|
+| -------- | -------- | -------- |
+| addrType | string | Device address type, which can be:<br>-&nbsp;**public**: a public address<br>-&nbsp;**random**: a random address|
+| addr | string | MAC address of the device.|
+| rssi | number | Received signal strength indicator (RSSl) of the device.|
+| txpower | string | **txpower** field in the Bluetooth advertising data.|
+| data | hex&nbsp;string | Bluetooth advertising data (including advertising data and scan response data), in a hexadecimal string.|
+
+**Example**
+
+  ```
+  bluetooth.startaBLEScan({
+    success() {
+      bluetooth.subscribeBLEFound({
+        success(data) {
+          const [device] = data.devices;
+          if (!!device) {
+            bluetooth.stopBLEScan();
+          }
+        }
+      });
+    },
+    fail(code, data) {
+      console.log('Failed to start BLE device scan, code: ${code}, data: ${data}');
+    }
+  });
+  ```
+
+
+## bluetooth.unsubscribeBLEFound()
+
+Unsubscribes from the newly detected devices.
+
+**Required permissions**: ohos.permission.DISCOVER_BLUETOOTH and ohos.permission.LOCATION
+
+**System capability**: SystemCapability.Communication.Bluetooth.Lite
+
+**Example**
+
+  ```
+  bluetooth.unsubscribeBLEFound();
+  ```
+
+
+## Common Error Codes
+
+| Error Code| Description|
+| -------- | -------- |
+| 1100 | The Bluetooth adapter is not initialized.|
+| 1101 | The Bluetooth adapter is unavailable.|
+| 1102 | The specified device is not found.|
+| 1103 | Connection failed.|
+| 1104 | The specified service is not found.|
+| 1105 | The specified characteristic value is not found.|
+| 1106 | The Bluetooth device is disconnected.|
+| 1107 | The characteristic value does not support this operation.|
+| 1108 | Other exceptions reported by the system.|
+| 1109 | The system version does not support BLE.|

en/application-dev/reference/apis/js-apis-system-storage.md

 # Data Storage
 
-> ![icon-note.gif](public_sys-resources/icon-note.gif) **Note：**
-> - The APIs of this module are no longer maintained since API version 6. It is recommended that you use [`@ohos.data.storage`](js-apis-data-storage.md) instead.
-> 
+> ![icon-note.gif](public_sys-resources/icon-note.gif) **NOTE**<br/>
+>
+> - The APIs of this module are no longer maintained since API Version 6. You are advised to use [`@ohos.data.storage`](js-apis-data-storage.md). From API Version 9, you are advised to use [`@ohos.data.preferences`](js-apis-data-preferences.md).
+>
 > - The initial APIs of this module are supported since API version 3. Newly added APIs will be marked with a superscript to indicate their earliest API version.
 
 
@@ -18,19 +19,19 @@ import storage from '@system.storage';
 
 get(Object): void
 
-Reads the stored content.
+Obtains the stored data.
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core
 
 **Parameters**
 
-| Name | Type | Mandatory | Description |
+| Name| Type| Mandatory| Description|
 | -------- | -------- | -------- | -------- |
-| key | string | Yes | Content&nbsp;index. |
-| default | string | No | Default&nbsp;value&nbsp;returned&nbsp;when&nbsp;the&nbsp;**key**&nbsp;does&nbsp;not&nbsp;exist. |
-| success | Function | No | Called&nbsp;when&nbsp;the&nbsp;stored&nbsp;content&nbsp;is&nbsp;successfully&nbsp;read. |
-| fail | Function | No | Called&nbsp;when&nbsp;the&nbsp;stored&nbsp;content&nbsp;fails&nbsp;to&nbsp;be&nbsp;read. |
-| complete | Function | No | Called&nbsp;when&nbsp;the&nbsp;execution&nbsp;is&nbsp;complete. |
+| key | string | Yes| Index of the data to obtain.|
+| default | string | No| Default value returned when the **key** does not exist.|
+| success | Function | No| Called when the stored data is successfully obtained.|
+| fail | Function | No| Called when the stored data failed to be obtained.|
+| complete | Function | No| Called when the execution is complete.|
 
 **Example**
 
@@ -58,19 +59,19 @@ export default {
 
 set(Object): void
 
-Modifies the stored content.
+Modifies the stored data.
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core
 
 **Parameters**
 
-| Name | Type | Mandatory | Description |
+| Name| Type| Mandatory| Description|
 | -------- | -------- | -------- | -------- |
-| key | string | Yes | Index&nbsp;of&nbsp;the&nbsp;stored&nbsp;content&nbsp;to&nbsp;be&nbsp;modified. |
-| value | string | No | Target&nbsp;storage&nbsp;content.&nbsp;The&nbsp;maximum&nbsp;number&nbsp;of&nbsp;characters&nbsp;allowed&nbsp;is&nbsp;128. |
-| success | Function | No | Called&nbsp;when&nbsp;the&nbsp;stored&nbsp;content&nbsp;is&nbsp;modified&nbsp;successfully. |
-| fail | Function | No | Called&nbsp;when&nbsp;the&nbsp;stored&nbsp;content&nbsp;fails&nbsp;to&nbsp;be&nbsp;modified. |
-| complete | Function | No | Called&nbsp;when&nbsp;the&nbsp;execution&nbsp;is&nbsp;complete. |
+| key | string | Yes| Index of the data to modify.|
+| value | string | No| New value to set. The maximum length is 128 bytes.|
+| success | Function | No| Called when the data is successfully modified.|
+| fail | Function | No| Called when the data failed to be modified.|
+| complete | Function | No| Called when the execution is complete.|
 
 **Example**
 
@@ -96,17 +97,17 @@ export default {
 
 clear(Object): void
 
-Clears the stored content.
+Clears the stored data.
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core
 
 **Parameters**
 
-| Name | Type | Mandatory | Description |
+| Name| Type| Mandatory| Description|
 | -------- | -------- | -------- | -------- |
-| success | Function | No | Called&nbsp;when&nbsp;the&nbsp;stored&nbsp;content&nbsp;is&nbsp;cleared&nbsp;successfully |
-| fail | Function | No | Called&nbsp;when&nbsp;the&nbsp;stored&nbsp;content&nbsp;fails&nbsp;to&nbsp;be&nbsp;cleared |
-| complete | Function | No | Called&nbsp;when&nbsp;the&nbsp;execution&nbsp;is&nbsp;complete |
+| success | Function | No| Called when the data is successfully cleared.|
+| fail | Function | No| Called when the data failed to be cleared.|
+| complete | Function | No| Called when the execution is complete.|
 
 **Example**
 
@@ -130,18 +131,18 @@ export default {
 
 delete(Object): void
 
-Deletes the stored content.
+Deletes the stored data.
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core
 
 **Parameters**
 
-| Name | Type | Mandatory | Description |
+| Name| Type| Mandatory| Description|
 | -------- | -------- | -------- | -------- |
-| key | string | Yes | Content&nbsp;index. |
-| success | Function | No | Called&nbsp;when&nbsp;the&nbsp;stored&nbsp;content&nbsp;is&nbsp;deleted&nbsp;successfully. |
-| fail | Function | No | Called&nbsp;when&nbsp;the&nbsp;stored&nbsp;content&nbsp;fails&nbsp;to&nbsp;be&nbsp;deleted. |
-| complete | Function | No | Called&nbsp;when&nbsp;the&nbsp;execution&nbsp;is&nbsp;complete. |
+| key | string | Yes| Index of the data to delete.|
+| success | Function | No| Called when the data is deleted.|
+| fail | Function | No| Called when the data failed to be deleted.|
+| complete | Function | No| Called when the execution is complete.|
 
 **Example**
 
@@ -159,4 +160,4 @@ export default {
     });    
   }
 }
-```
+```
\ No newline at end of file