diff --git a/en/application-dev/database/database-relational-guidelines.md b/en/application-dev/database/database-relational-guidelines.md
index c8ff6bc64eeccb90c131d5ac4e799b09e6293b9c..688835122445f6800d83a76fa0633b0be64f385c 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
 
-A relational database (RDB) store allows you to operate local data with or without native SQL statements based on SQLite.
+A relational database (RDB) store allows you to manage local data with or without native SQL statements based on SQLite.
 
 
 ## Available APIs
@@ -21,11 +21,11 @@ The table below describes the APIs available for creating and deleting an RDB st
 
 ### Managing Data in an RDB Store
 
-The RDB provides APIs for inserting, deleting, updating, and querying data in the local RDB store.
+The **RDB** module provides APIs for inserting, deleting, updating, and querying data in a local RDB store.
 
 - **Inserting Data**
   
-  The RDB provides APIs for inserting data through a **ValuesBucket** in a data table. If the data is inserted, the row ID of the data inserted will be returned; otherwise, **-1** will be returned.
+  The **RDB** module provides APIs for inserting data through a **ValuesBucket** in a data table. If the data is inserted, the row ID of the data inserted will be returned; otherwise, **-1** will be returned.
   
   **Table 2** API for inserting data
   
@@ -41,7 +41,7 @@ The RDB provides APIs for inserting, deleting, updating, and querying data in th
   
   | Class| API| Description|
   | -------- | -------- | -------- |
-  | RdbStore | update(values:ValuesBucket,rdbPredicates:RdbPredicates):Promise\<number> | Updates data based on the specified **RdbPredicates** object. This API uses a promise to return the result.<br>Return value: number of rows updated.<br>- **values**: data to update, which is stored in **ValuesBucket**.<br>- **rdbPredicates**: conditions for updating data. |
+  | RdbStore | update(values:ValuesBucket,rdbPredicates:RdbPredicates):Promise\<number> | Updates data based on the specified **RdbPredicates** object. This API uses a promise to return the result.<br>Return value: number of rows updated.<br>- **values**: data to update, which is stored in **ValuesBucket**.<br>- **rdbPredicates**: conditions for updating data.|
   
 - **Deleting Data**
   
@@ -51,7 +51,7 @@ The RDB provides APIs for inserting, deleting, updating, and querying data in th
   
   | Class| API| Description|
   | -------- | -------- | -------- |
-  | RdbStore | delete(rdbPredicates:RdbPredicates):Promise\<number> | Deletes data from the RDB store based on the specified **RdbPredicates** object. This API uses a promise to return the result.<br>Return value: number of rows updated.<br>- **rdbPredicates**: conditions for deleting data. |
+  | RdbStore | delete(rdbPredicates:RdbPredicates):Promise\<number> | Deletes data from the RDB store based on the specified **RdbPredicates** object. This API uses a promise to return the result.<br>Return value: number of rows updated.<br>- **rdbPredicates**: conditions for deleting data.|
   
 - **Querying data**
 
@@ -69,19 +69,19 @@ The RDB provides APIs for inserting, deleting, updating, and querying data in th
 
 ### Using Predicates
 
-The RDB provides **RdbPredicates** for you to set database operation conditions.
+The **RDB** module provides **RdbPredicates** for you to set database operation conditions.
 
-The following lists common predicates. For more information about predicates, see [**RdbPredicates**](../reference/apis/js-apis-data-rdb.md#rdbpredicates).
+The table below lists common predicates. For more information about predicates, see [**RdbPredicates**](../reference/apis/js-apis-data-rdb.md#rdbpredicates).
 
 **Table 6** APIs for using RDB store predicates
 
 | Class| API| Description|
 | -------- | -------- | -------- |
-| RdbPredicates | equalTo(field:string,value:ValueType):RdbPredicates | Sets an **RdbPredicates** to match the field with data type **ValueType** and value equal to the specified value.<br>- **field**: column name in the database table.<br>- **value**: value to match the **RdbPredicates**.<br>- **RdbPredicates**: **RdbPredicates** object that matches the specified field. |
-| RdbPredicates | notEqualTo(field:string,value:ValueType):RdbPredicates | Sets an **RdbPredicates** to match the field with data type **ValueType** and value not equal to the specified value.<br>- **field**: column name in the database table.<br>- **value**: value to match the **RdbPredicates**.<br>- **RdbPredicates**: **RdbPredicates** object that matches the specified field. |
-| RdbPredicates | or():RdbPredicates | Adds the OR condition to the **RdbPredicates**.<br>- **RdbPredicates**: **RdbPredicates** with the OR condition.|
-| RdbPredicates | and():RdbPredicates | Adds the AND condition to the **RdbPredicates**.<br>- **RdbPredicates**: **RdbPredicates** with the AND condition.|
-| RdbPredicates | contains(field:string,value:string):RdbPredicats | Sets an **RdbPredicates** to match a string that contains the specified value.<br>- **field**: column name in the database table.<br>- **value**: value to match the **RdbPredicates**.<br>- **RdbPredicates**: **RdbPredicates** object that matches the specified field. |
+| RdbPredicates | equalTo(field:string,value:ValueType):RdbPredicates | Sets an **RdbPredicates** object to match the field with data type **ValueType** and value equal to the specified value.<br>- **field**: column name in the database table.<br>- **value**: value to match the **RdbPredicates**.<br>- **RdbPredicates**: **RdbPredicates** object created.|
+| RdbPredicates | notEqualTo(field:string,value:ValueType):RdbPredicates | Sets an **RdbPredicates** object to match the field with data type **ValueType** and value not equal to the specified value.<br>- **field**: column name in the database table.<br>- **value**: value to match the **RdbPredicates**.<br>- **RdbPredicates**: **RdbPredicates** object created.|
+| RdbPredicates | or():RdbPredicates | Adds the OR condition to the **RdbPredicates** object.<br>- **RdbPredicates**: **RdbPredicates** with the OR condition.|
+| RdbPredicates | and():RdbPredicates | Adds the AND condition to the **RdbPredicates** object.<br>- **RdbPredicates**: **RdbPredicates** with the AND condition.|
+| RdbPredicates | contains(field:string,value:string):RdbPredicats | Sets an **RdbPredicates** object to match a string that contains the specified value.<br>- **field**: column name in the database table.<br>- **value**: value to match the **RdbPredicates**.<br>- **RdbPredicates**: **RdbPredicates** object created.|
 
 
 ### Using the Result Set