diff --git a/en/application-dev/notification/assistant-guidelines.md b/en/application-dev/notification/assistant-guidelines.md
index 35d3eaeaaddd023861056fe819fbe4016c59bb01..c6de99e3fee6919ef1ca1e1a0f87a7aa0a890a74 100644
--- a/en/application-dev/notification/assistant-guidelines.md
+++ b/en/application-dev/notification/assistant-guidelines.md
@@ -2,9 +2,9 @@
 
 The common event and notification module provides debugging tools to facilitate your application development. With these tools, you can view common event and notification information, publish common events, and more. These tools have been integrated with the system. You can run related commands directly in the shell.
 
-### cem Debugging Assistant
+## cem Debugging Assistant
 
-##### publish
+### publish
 
 * Functionality
 
@@ -41,7 +41,7 @@ The common event and notification module provides debugging tools to facilitate
 
    ![cem-publish-all](figures/cem-publish-all.png)
 
-##### dump
+### dump
 
 * Functionality
 
@@ -67,7 +67,7 @@ The common event and notification module provides debugging tools to facilitate
 
 ​        ![cem-dump-e](figures/cem-dump-e.png)
 
-##### help
+### help
 
 * Functionality
 
@@ -83,9 +83,9 @@ The common event and notification module provides debugging tools to facilitate
 
 
 
-### anm Debugging Assistant
+## anm Debugging Assistant
 
-##### dump
+### dump
 
 * Functionality
 
@@ -119,7 +119,7 @@ The common event and notification module provides debugging tools to facilitate
 
   Set the number of the cached recent notifications to be displayed to 10.
 
-##### help
+### help
 
 * Functionality
 
diff --git a/en/application-dev/notification/common-event.md b/en/application-dev/notification/common-event.md
index b2cce59950d2187fe6026b8715b1b22c018f01b9..e48bcd802e2a1d16536c29193748b14193517e4c 100644
--- a/en/application-dev/notification/common-event.md
+++ b/en/application-dev/notification/common-event.md
@@ -1,5 +1,5 @@
 # Common Event Development
-### Introduction
+## Introduction
 OpenHarmony provides a Common Event Service (CES) for applications to subscribe to, publish, and unsubscribe from common events.
 
 Common events are classified into system common events and custom common events.