diff --git a/en/application-dev/database/database-relational-guidelines.md b/en/application-dev/database/database-relational-guidelines.md
index fb5e1b12a5bd99385762706a006335985a65f22a..50d34b56ce3309b953285083d9ce97405e0721d2 100644
--- a/en/application-dev/database/database-relational-guidelines.md
+++ b/en/application-dev/database/database-relational-guidelines.md
@@ -2,7 +2,7 @@
 
 ## When to Use
 
-On the basis of the SQLite database, the relational database (RDB) allows you to operate data with or without native SQL statements. In OpenHarmony, an RDB is also called RDB store.
+A relational database (RDB) store allows you to operate local data with or without native SQL statements based on SQLite.
 
 
 ## Available APIs
@@ -11,7 +11,7 @@ For details about RDB APIs, see [Relational Database](../reference/apis/js-apis-
 
 ### Creating or Deleting an RDB Store
 
-The following table describes the APIs available for creating and deleting an RDB store.
+The table below describes the APIs available for creating and deleting an RDB store.
 
 **Table 1** APIs for creating and deleting an RDB store
 
@@ -56,8 +56,8 @@ The RDB provides APIs for inserting, deleting, updating, and querying data in th
   
   | Class| API| Description|
   | -------- | -------- | -------- |
-  | RdbStore | delete(predicates: RdbPredicates, callback: AsyncCallback&lt;number&gt;):void | Deletes data from the database based on the specified **RdbPredicates** object. This API uses an asynchronous callback to return the result.<br>- **predicates**: conditions for deleting data.<br>- **callback**: callback invoked to return the number of rows updated.|
-  | RdbStore | delete(predicates: RdbPredicates): Promise&lt;number&gt; | Deletes data from the database based on the specified **RdbPredicates** object. This API uses a promise to return the result.<br>- **predicates**: conditions for deleting data.|
+  | RdbStore | delete(predicates: RdbPredicates, callback: AsyncCallback&lt;number&gt;):void | Deletes data from the RDB store based on the specified **RdbPredicates** object. This API uses an asynchronous callback to return the result.<br>- **predicates**: conditions for deleting data.<br>- **callback**: callback invoked to return the number of rows updated.|
+  | RdbStore | delete(predicates: RdbPredicates): Promise&lt;number&gt; | Deletes data from the RDB store based on the specified **RdbPredicates** object. This API uses a promise to return the result.<br>- **predicates**: conditions for deleting data.|
   
 - **Querying data**
 
@@ -70,8 +70,8 @@ The RDB provides APIs for inserting, deleting, updating, and querying data in th
 
   | Class| API| Description|
   | -------- | -------- | -------- |
-  | RdbStore | query(predicates: RdbPredicates, columns: Array, callback: AsyncCallback&lt;ResultSet&gt;): void | Queries data in the RDB store based on the specified **RdbPredicates** object. This API uses a callback to return the result.<br>- **predicates**: conditions for querying data.<br>- **columns**: columns to query. If this parameter is not specified, the query applies to all columns.<br>- **callback**: callback invoked to return the result. If the operation is successful, a **ResultSet** object will be returned.|
-  | RdbStore | query(predicates: RdbPredicates, columns: Array): Promise&lt;ResultSet&gt; | Queries data in the RDB store based on the specified **RdbPredicates** object. This API uses a promise to return the result.<br>- **predicates**: conditions for querying data.<br>- **columns**: columns to query. If this parameter is not specified, the query applies to all columns.|
+  | RdbStore | query(predicates: RdbPredicates, columns: Array&lt;string&gt;, callback: AsyncCallback&lt;ResultSet&gt;): void | Queries data in the RDB store based on the specified **RdbPredicates** object. This API uses a callback to return the result.<br>- **predicates**: conditions for querying data.<br>- **columns**: columns to query. If this parameter is not specified, the query applies to all columns.<br>- **callback**: callback invoked to return the result. If the operation is successful, a **ResultSet** object will be returned.|
+  | RdbStore | query(predicates: RdbPredicates, columns?: Array&lt;string&gt;): Promise&lt;ResultSet&gt; | Queries data in the RDB store based on the specified **RdbPredicates** object. This API uses a promise to return the result.<br>- **predicates**: conditions for querying data.<br>- **columns**: columns to query. If this parameter is not specified, the query applies to all columns.|
   | RdbStore | querySql(sql: string, bindArgs: Array&lt;ValueType&gt;, callback: AsyncCallback&lt;ResultSet&gt;):void | Queries data in the RDB store using the specified SQL statement. This API uses a callback to return the result.<br>- **sql**: SQL statement.<br>- **bindArgs**: arguments in the SQL statement.<br>- **callback**: callback invoked to return the result. If the operation is successful, a **ResultSet** object will be returned.|
   | RdbStore | querySql(sql: string, bindArgs?: Array&lt;ValueType&gt;):Promise&lt;ResultSet&gt; | Queries data in the RDB store using the specified SQL statement. This API uses a promise to return the result.<br>- **sql**: SQL statement.<br>- **bindArgs**: arguments in the SQL statement.|
 
@@ -167,7 +167,7 @@ You can obtain the distributed table name for a remote device based on the local
 
 **Synchronizing Data Between Devices**
 
-**Table 10** APIs for cross-device data synchronization
+**Table 10** APIs for synchronizing data between devices
 
 | Class| API| Description|
 | -------- | -------- | -------- |
@@ -251,9 +251,9 @@ You can obtain the distributed table name for a remote device based on the local
 
    (1) Create an **RdbPredicates** object to specify query conditions.
 
-   (2) Call the query() API to query data.
+   (2) Call the **query()** API to query data.
 
-   (3) Call the resultSet() API to obtain the result.
+   (3) Call the **resultSet()** API to obtain the result.
 
    The sample code is as follows:
 
@@ -283,7 +283,7 @@ You can obtain the distributed table name for a remote device based on the local
         }
     ```
 
-    (2) Obtain the application permissions.
+    (2) Obtain the required permissions.
 
     (3) Set the distributed tables.
 
diff --git a/en/application-dev/reference/apis/js-apis-bluetooth.md b/en/application-dev/reference/apis/js-apis-bluetooth.md
index 42be84f040bf62367601a1a39c640255b6f16b87..5eacfc8a69610d57abec3afdd0fba6f7addaa30b 100644
--- a/en/application-dev/reference/apis/js-apis-bluetooth.md
+++ b/en/application-dev/reference/apis/js-apis-bluetooth.md
@@ -201,7 +201,7 @@ Obtains the connection state of a profile.
 
 | Name      | Type       | Mandatory  | Description                                   |
 | --------- | --------- | ---- | ------------------------------------- |
-| ProfileId | profileId | Yes   | ID of the profile to obtain, for example, **PROFILE_A2DP_SOURCE**.|
+| ProfileId | profileId | Yes   | ID of the target profile, for example, **PROFILE_A2DP_SOURCE**.|
 
 **Return value**
 
@@ -447,7 +447,7 @@ Sets the device pairing confirmation.
 
 | Name   | Type     | Mandatory  | Description                              |
 | ------ | ------- | ---- | -------------------------------- |
-| device | string  | Yes   | Address of the remote device, for example, XX:XX:XX:XX:XX:XX.|
+| device | string  | Yes   | Address of the target remote device, for example, XX:XX:XX:XX:XX:XX.|
 | accept | boolean | Yes   | Whether to accept the pairing request. The value **true** means to accept the pairing request, and the value **false** means the opposite.       |
 
 **Return value**
@@ -1039,9 +1039,9 @@ let a2dpSrc = bluetooth.getProfile(bluetooth.ProfileId.PROFILE_A2DP_SOURCE);
 
 ## bluetooth.getProfile<sup>9+</sup><a name="getProfile"></a>
 
-getProfile(profileId: ProfileId): A2dpSourceProfile | HandsFreeAudioGatewayProfile | HidHostProfile
+getProfile(profileId: ProfileId): A2dpSourceProfile | HandsFreeAudioGatewayProfile | HidHostProfile | PanProfile
 
-Obtains a profile instance. **HidHostProfile** is added in API version 9.
+Obtains a profile instance. API version 9 is added with **HidHostProfile** and **PanProfile**.
 
 **System capability**: SystemCapability.Communication.Bluetooth.Core
 
@@ -1055,7 +1055,7 @@ Obtains a profile instance. **HidHostProfile** is added in API version 9.
 
 | Type                                                        | Description                                                        |
 | ------------------------------------------------------------ | ------------------------------------------------------------ |
-| [A2dpSourceProfile](#A2dpSourceProfile), [HandsFreeAudioGatewayProfile](#HandsFreeAudioGatewayProfile), or [HidHostProfile](#HidHostProfile) | Profile object obtained. **A2dpSourceProfile**, **HandsFreeAudioGatewayProfile**, and **HidHostProfile** are supported.|
+| [A2dpSourceProfile](#A2dpSourceProfile), [HandsFreeAudioGatewayProfile](#HandsFreeAudioGatewayProfile), [HidHostProfile](#HidHostProfile), or [PanProfile](#PanProfile)| Profile instance obtained, which can be **A2dpSourceProfile**, **HandsFreeAudioGatewayProfile**, **HidHostProfile**, or **PanProfile**.|
 
 **Example**
 
@@ -1344,7 +1344,7 @@ Sets up an Advanced Audio Distribution Profile (A2DP) connection.
 
 | Name   | Type    | Mandatory  | Description     |
 | ------ | ------ | ---- | ------- |
-| device | string | Yes   | Address of the remote device to connect.|
+| device | string | Yes   | Address of the target device.|
 
 **Return value**
 
@@ -1374,7 +1374,7 @@ Disconnects an A2DP connection.
 
 | Name   | Type    | Mandatory  | Description     |
 | ------ | ------ | ---- | ------- |
-| device | string | Yes   | Address of the remote device to disconnect.|
+| device | string | Yes   | Address of the target device.|
 
 **Return value**
 
@@ -1737,6 +1737,162 @@ hidHost.off('connectionStateChange', onReceiveEvent);
 ```
 
 
+## PanProfile
+
+Before using a method of **PanProfile**, you need to create an instance of this class by using the **getProfile()** method.
+
+
+### disconnect<sup>9+</sup><a name="disconnect"></a>
+
+disconnect(device: string): boolean
+
+Disconnects from the Personal Area Network (PAN) service of a device.
+
+This is a system API.
+
+**Required permissions**: ohos.permission.USE_BLUETOOTH
+
+**System capability**: SystemCapability.Communication.Bluetooth.Core
+
+**Parameters**
+
+| Name   | Type    | Mandatory  | Description     |
+| ------ | ------ | ---- | ------- |
+| device | string | Yes   | Address of the target device.|
+
+**Return value**
+
+| Type     | Description                 |
+| --------------------- | --------------------------------- |
+| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
+
+**Example**
+
+```js
+let panProfile = bluetooth.getProfile(bluetooth.ProfileId.PROFILE_PAN_NETWORK);
+let ret = panProfile.disconnect('XX:XX:XX:XX:XX:XX');
+```
+
+
+### on('connectionStateChange')<sup>9+</sup>
+
+on(type: "connectionStateChange", callback: Callback&lt;[StateChangeParam](#StateChangeParam)&gt;): void
+
+Subscribes to the PAN connection state change events.
+
+**System capability**: SystemCapability.Communication.Bluetooth.Core
+
+**Parameters**
+
+| Name     | Type                                      | Mandatory  | Description                                      |
+| -------- | ---------------------------------------- | ---- | ---------------------------------------- |
+| type     | string                                   | Yes   | Event type. The value **connectionStateChange** indicates a PAN connection state change event.|
+| callback | Callback&lt;[StateChangeParam](#StateChangeParam)&gt; | Yes   | Callback used to return the PAN connection state change event.                              |
+
+**Return value**
+
+No value is returned.
+
+**Example**
+
+```js
+function onReceiveEvent(data) {
+    console.info('pan state = '+ JSON.stringify(data));
+}
+let panProfile = bluetooth.getProfile(bluetooth.ProfileId.PROFILE_PAN_NETWORK);
+panProfile.on('connectionStateChange', onReceiveEvent);
+```
+
+
+### off('connectionStateChange')<sup>9+</sup>
+
+off(type: "connectionStateChange", callback?: Callback&lt;[StateChangeParam](#StateChangeParam)&gt;): void
+
+Unsubscribes from the PAN connection state change events.
+
+**System capability**: SystemCapability.Communication.Bluetooth.Core
+
+**Parameters**
+
+| Name  | Type                                                 | Mandatory| Description                                                     |
+| -------- | ----------------------------------------------------- | ---- | --------------------------------------------------------- |
+| type     | string                                                | Yes  | Event type. The value **connectionStateChange** indicates a PAN connection state change event.|
+| callback | Callback&lt;[StateChangeParam](#StateChangeParam)&gt; | No  | Callback used to return the PAN connection state change event.                                     |
+
+**Return value**
+
+No value is returned.
+
+**Example**
+
+```js
+function onReceiveEvent(data) {
+    console.info('pan state = '+ JSON.stringify(data));
+}
+let panProfile = bluetooth.getProfile(bluetooth.ProfileId.PROFILE_PAN_NETWORK);
+panProfile.on('connectionStateChange', onReceiveEvent);
+panProfile.off('connectionStateChange', onReceiveEvent);
+```
+
+
+### setTethering<sup>9+</sup><a name="setTethering"></a>
+
+setTethering(value: boolean): boolean
+
+Sets tethering.
+
+This is a system API.
+
+**Required permissions**: ohos.permission.DISCOVER_BLUETOOTH
+
+**System capability**: SystemCapability.Communication.Bluetooth.Core
+
+**Parameters**
+
+| Name   | Type    | Mandatory  | Description     |
+| ------ | ------ | ---- | ------- |
+| value | boolean | Yes   | Whether to set tethering over a Bluetooth PAN.|
+
+**Return value**
+
+| Type     | Description                 |
+| --------------------- | --------------------------------- |
+| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
+
+**Example**
+
+```js
+let panProfile = bluetooth.getProfile(bluetooth.ProfileId.PROFILE_PAN_NETWORK);
+let ret = panProfile.setTethering(true);
+```
+
+
+### isTetheringOn<sup>9+</sup><a name="isTetheringOn"></a>
+
+isTetheringOn(): boolean
+
+Obtains the tethering status.
+
+This is a system API.
+
+**Required permissions**: ohos.permission.DISCOVER_BLUETOOTH
+
+**System capability**: SystemCapability.Communication.Bluetooth.Core
+
+**Return value**
+
+| Type     | Description                 |
+| --------------------- | --------------------------------- |
+| boolean | Returns **true** if tethering is available over a Bluetooth PAN; return **false** otherwise.|
+
+**Example**
+
+```js
+let panProfile = bluetooth.getProfile(bluetooth.ProfileId.PROFILE_PAN_NETWORK);
+let ret = panProfile.isTetheringOn();
+```
+
+
 ## GattServer
 
 Implements the Generic Attribute Profile (GATT) server. Before using a method of this class, you need to create a **GattServer** instance using the **createGattServer()** method.
@@ -2346,6 +2502,7 @@ let gattServer = bluetooth.BLE.createGattServer();
 gattServer.off("descriptorWrite");
 ```
 
+
 ### on('connectStateChange')
 
 on(type: "connectStateChange", callback: Callback&lt;BLEConnectChangedState&gt;): void
@@ -2562,7 +2719,7 @@ gattClientDevice.getServices().then(result => {
 
 readCharacteristicValue(characteristic: BLECharacteristic, callback: AsyncCallback&lt;BLECharacteristic&gt;): void
 
-Reads the characteristic value of the specific service of the remote BLE device. This API uses an asynchronous callback to return the result.
+Reads the characteristic value of the specific service of the peer BLE device. This API uses an asynchronous callback to return the result.
 
 **Required permissions**: ohos.permission.USE_BLUETOOTH
 
@@ -2616,7 +2773,7 @@ device.readCharacteristicValue(characteristic, readCcc);
 
 readCharacteristicValue(characteristic: BLECharacteristic): Promise&lt;BLECharacteristic&gt;
 
-Reads the characteristic value of the specific service of the remote BLE device. This API uses a promise to return the result.
+Reads the characteristic value of the specific service of the peer BLE device. This API uses a promise to return the result.
 
 **Required permissions**: ohos.permission.USE_BLUETOOTH
 
@@ -2663,7 +2820,7 @@ device.readCharacteristicValue(characteristic);
 
 readDescriptorValue(descriptor: BLEDescriptor, callback: AsyncCallback&lt;BLEDescriptor&gt;): void
 
-Reads the descriptor contained in the specific characteristic of the remote BLE device. This API uses an asynchronous callback to return the result.
+Reads the descriptor contained in the specific characteristic of the peer BLE device. This API uses an asynchronous callback to return the result.
 
 **Required permissions**: ohos.permission.USE_BLUETOOTH
 
@@ -2707,7 +2864,7 @@ device.readDescriptorValue(descriptor, readDesc);
 
 readDescriptorValue(descriptor: BLEDescriptor): Promise&lt;BLEDescriptor&gt;
 
-Reads the descriptor contained in the specific characteristic of the remote BLE device. This API uses a promise to return the result.
+Reads the descriptor contained in the specific characteristic of the peer BLE device. This API uses a promise to return the result.
 
 **Required permissions**: ohos.permission.USE_BLUETOOTH
 
@@ -3154,7 +3311,7 @@ Enumerates the scan modes.
 
 **System capability**: SystemCapability.Communication.Bluetooth.Core
 
-| Name                                      | Default Value | Description             |
+| Name                                      | Default Value  | Description             |
 | ---------------------------------------- | ---- | --------------- |
 | SCAN_MODE_NONE                           | 0    | No scan mode.        |
 | SCAN_MODE_CONNECTABLE                    | 1    | Connectable mode.       |
@@ -3169,7 +3326,7 @@ Enumerates the pairing states.
 
 **System capability**: SystemCapability.Communication.Bluetooth.Core
 
-| Name                | Default Value | Description    |
+| Name                | Default Value  | Description    |
 | ------------------ | ---- | ------ |
 | BOND_STATE_INVALID | 0    | Invalid pairing.|
 | BOND_STATE_BONDING | 1    | Pairing. |
@@ -3195,7 +3352,7 @@ Enumerates the SPP link types.
 
 **System capability**: SystemCapability.Communication.Bluetooth.Core
 
-| Name        | Default Value | Description           |
+| Name        | Default Value  | Description           |
 | ---------- | ---- | ------------- |
 | SPP_RFCOMM | 0    | Radio frequency communication (RFCOMM) link type.|
 
diff --git a/en/application-dev/reference/apis/js-apis-cardEmulation.md b/en/application-dev/reference/apis/js-apis-cardEmulation.md
index 3f0d063a7e435b2f777f79bb6934aaf8d233e13a..7c65ecbd616c0bd3ea8fb0c7f7b12a06b67533d4 100644
--- a/en/application-dev/reference/apis/js-apis-cardEmulation.md
+++ b/en/application-dev/reference/apis/js-apis-cardEmulation.md
@@ -1,12 +1,12 @@
 # Standard NFC Card Emulation
 
-Implements Near-Field Communication (NFC) card emulation.
+The cardEmulation module implements Near-Field Communication (NFC) card emulation.
 
 > **NOTE**<br>
 > The initial APIs of this module are supported since API version 8. Newly added APIs will be marked with a superscript to indicate their earliest API version.
 
 
-## **Modules to Import**
+## Modules to Import
 
 ```
 import cardEmulation from '@ohos.nfc.cardEmulation';