update en/application-dev/database/database-relational-guidelines.md.

Signed-off-by: N@ge-yafang <geyafang@huawei.com>

en/application-dev/database/database-relational-guidelines.md

@@ -148,7 +148,7 @@ A result set can be regarded as a row of data in the queried results. It allows
 | Class    | API                                                          | Description                                                  |
 | -------- | ------------------------------------------------------------ | ------------------------------------------------------------ |
 | RdbStore | setDistributedTables(tables: Array\<string>, callback: AsyncCallback\<void>): void | Sets a list of distributed tables. This method uses a callback to return the result.<br>- &nbsp;**tables**: names of the distributed tables to set.<br>-&nbsp;**callback**: callback invoked to return the result. |
-| RdbStore | setDistributedTables(tables: Array\<string>): Promise<void>  | Sets a list of distributed tables. This method uses a promise to return the result.<br>- &nbsp;**tables**: names of the distributed tables to set. |
+| RdbStore | setDistributedTables(tables: Array\<string>): Promise\<void> | Sets a list of distributed tables. This method uses a promise to return the result.<br>- &nbsp;**tables**: names of the distributed tables to set. |
 
 **Obtaining the Distributed Table Name for a Remote Device**
 
@@ -190,6 +190,7 @@ You can obtain the distributed table name for a remote device based on the local
 ## How to Develop
 
 1. Create an RDB store.
+
    1. Configure the RDB store attributes, including the RDB store name, storage mode, and whether read-only mode is used.
    2. Initialize the table structure and related data in the RDB store.
    3. Create the RDB store.
@@ -208,6 +209,7 @@ You can obtain the distributed table name for a remote device based on the local
    ```
 
 2. Insert data.
+
    1. Create a **ValuesBucket** to store the data you need to insert.
    2. Call the **insert()** method to insert data into the RDB store.
 
@@ -220,6 +222,7 @@ You can obtain the distributed table name for a remote device based on the local
    ```
 
 3. Query data.
+
    1. Create an **RdbPredicates** object to specify query conditions.
    2. Call the **query()** method to query data.
    3. Call the **ResultSet()** method to obtain the query result.
@@ -242,6 +245,7 @@ You can obtain the distributed table name for a remote device based on the local
    ```
 
 4. Set the distributed tables to be synchronized.
+
    1. Set the distributed tables.
    2. Check whether the setting is successful.
 
@@ -257,6 +261,7 @@ You can obtain the distributed table name for a remote device based on the local
    ```
 
  5. Synchronize data across devices.
+
     1. Constructs an **RdbPredicates** object to specify remote devices within the network to be synchronized.
     2. Call the **sync()** method to synchronize data.
     3. Check whether the data synchronization is successful.
@@ -278,6 +283,7 @@ You can obtain the distributed table name for a remote device based on the local
     ```
 
 6. Subscribe to distributed data.
+
    1. Register an observer to listen for distributed data changes.
    2. When data in the RDB store changes, a callback will be invoked to return the data changes.
 
@@ -297,6 +303,7 @@ You can obtain the distributed table name for a remote device based on the local
    ```
 
 7. Query data across devices.
+
    1. Obtain the distributed table name for a remote device based on the local table name.
    2. Call the **ResultSet()** method to obtain the query result.