diff --git a/en/application-dev/tools/aa-tool.md b/en/application-dev/tools/aa-tool.md
index e03cdd52c6df142c13a06c918ae242c4115b323c..69db1fd8814bd5880063bb063f6c77db1b4a281c 100644
--- a/en/application-dev/tools/aa-tool.md
+++ b/en/application-dev/tools/aa-tool.md
@@ -6,14 +6,14 @@ The Ability Assistant provides the application debugging and testing capabilitie
 
 - help
   
-Displays help information for the Ability Assistant.
-  
-**Return value**
-  
-Returns the help information.
-  
-**Method**
-  
+  Displays help information for the Ability Assistant.
+
+  **Return value**
+
+  Returns the help information.
+
+  **Method**
+
   
   ```bash
   aa help
@@ -22,97 +22,97 @@ Returns the help information.
 
 - start
   
-Starts an application component. The target component can be the PageAbility and ServiceAbility components of the FA model or the UIAbility and ServiceExtensionAbility components of the Stage model. The **visible** tag in the configuration file of the target component cannot be set to **false**.
-  
+  Starts an application component. The target component can be the PageAbility and ServiceAbility components of the FA model or the UIAbility and ServiceExtensionAbility components of the Stage model. The **visible** tag in the configuration file of the target component cannot be set to **false**.
+
   | Name| Description|
   | -------- | -------- |
   | -h/--help | Help information.|
   | -d | Device ID. Optional.|
   | -a | Ability name. Mandatory.|
   | -b | Bundle name. Mandatory.|
-| -D | Debugging mode. Optional.|
-  
-**Return value**
-  
-Returns "start ability successfully." if the ability is started; returns "error: failed to start ability." and the corresponding error information otherwise.
-  
-**Method**
-  
+  | -D | Debugging mode. Optional.|
+
+  **Return value**
+
+  Returns "start ability successfully." if the ability is started; returns "error: failed to start ability." and the corresponding error information otherwise.
+
+  **Method**
+
   
   ```bash
   aa start [-d <deviceId>] -a <abilityName> -b <bundleName> [-D]
-```
-  
+  ```
+
 - stop-service
   
-Stops a ServiceAbility.
-  
+  Stops a ServiceAbility.
+
   | Name| Description|
   | -------- | -------- |
   | -h/--help | Help information.|
   | -d | Device ID. Optional.|
   | -a | Ability name. Mandatory.|
-| -b | Bundle name. Mandatory.|
-  
-**Return value**
-  
-Returns "stop service ability successfully." if the ServiceAbility is stopped; returns "error: failed to stop service ability." otherwise.
-  
-**Method**
-  
+  | -b | Bundle name. Mandatory.|
+
+  **Return value**
+
+  Returns "stop service ability successfully." if the ServiceAbility is stopped; returns "error: failed to stop service ability." otherwise.
+
+  **Method**
+
   
   ```bash
   aa stop-service [-d <deviceId>] -a <abilityName> -b <bundleName>
-```
-  
+  ```
+
 - dump
-    
+  
     Prints information about an application component.
   
-  | Name| Level-2 Parameter| Description|
+    | Name| Level-2 Parameter| Description|
   | -------- | -------- | -------- |
   | -h/--help | - | Help information.|
   | -a/--all | - | Application component information in all missions.|
-  | -l/--mission-list | type (All logs are printed if this parameter is left unspecified.)| Mission stack information.<br>The following values are available for **type**:<br>- NORMAL<br>- DEFAULT_STANDARD<br>- DEFAULT_SINGLE<br>- LAUNCHER |
+  | -l/--mission-list | type (All logs are printed if this parameter is left unspecified.)| For better management, the service side maintains four types of MissionLists, as described below:<br>- **NORMAL**: MissionList that is started normally. For example, if A starts B and C, the corresponding MissionList is A->B->C.<br>- **DEFAULT_STANDARD**: If a MissionList is damaged, missions with the launch type set to **standard** are removed to this MissionList. The Missions in it are not associated with each other.<br>- **DEFAULT_SINGLE**: If a MissionList is damaged, missions with the launch type set to **singleton** are removed to this MissionList. The Missions in it are not associated with each other.<br>- **LAUNCHER**: MissionList for launcher abilities. |
   | -e/--extension | elementName | Extended component information.|
   | -u/--userId | UserId | Mission stack information of a specified user ID. This parameter must be used together with other parameters. Example commands: **aa dump -a -u 100** and **aa dump -d -u 100**.|
   | -d/--data | - | DataAbility information.|
-| -i/--ability | AbilityRecord ID | Detailed information about an application component.|
+  | -i/--ability | AbilityRecord ID | Detailed information about an application component.|
   | -c/--client | - | Detailed information about an application component. This parameter must be used together with other parameters. Example commands: **aa dump -a -c** and **aa dump -i 21 -c**.|
 
   **Method**
-  
+
   
   ```bash
-aa dump -a
+  aa dump -a
   ```
 
   ![aa-dump-a](figures/aa-dump-a.png)
-  
+
   
   ```bash
-aa dump -l
+  aa dump -l
   ```
 
   ![aa-dump-l](figures/aa-dump-l.png)
-  
+
   
   ```bash
-aa dump -i 12
+  aa dump -i 12
   ```
 
-    ![aa-dump-i](figures/aa-dump-i.png)
-    
+  ![aa-dump-i](figures/aa-dump-i.png)
+
 - force-stop
   
-Forcibly stops a process based on the bundle name.
-  
-**Return value**
-  
-Returns "force stop process successfully." if the process is forcibly stopped; returns "error: failed to force stop process." otherwise.
-  
-**Method**
-  
+  Forcibly stops a process based on the bundle name.
+
+  **Return value**
+
+  Returns "force stop process successfully." if the process is forcibly stopped; returns "error: failed to force stop process." otherwise.
+
+  **Method**
+
   
   ```bash
   aa force-stop <bundleName>