diff --git a/en/device-dev/subsystems/subsys-boot-overview.md b/en/device-dev/subsystems/subsys-boot-overview.md
index f3befef53f6348bc9299666ab9136ac8b68a3f0c..c1adc013182349d0a93621bd84db02445cd5a40a 100644
--- a/en/device-dev/subsystems/subsys-boot-overview.md
+++ b/en/device-dev/subsystems/subsys-boot-overview.md
@@ -57,9 +57,7 @@ The Startup subsystem consists of the following modules:
- When porting a new chip platform, you need to add the **/vendor/etc/init/init.{hardware}.cfg** file that contains the platform-level initialization configuration. This file is used to implement platform-level initialization, for example, installing the ko driver and configuring information on the related **/proc** nodes.
- > ![icon-note.gif](public_sys-resources/icon-note.gif) **NOTE**
-
- > The configuration file **init.cfg** must be in JSON format.
+ > **NOTE**: The configuration file **init.cfg** must be in JSON format.
- bootstrap module: The zInit code must be configured in the link script.
@@ -188,9 +186,7 @@ On each development board, you need to partition the memory to store the precedi
This example assumes the **system** partition as the required partition on the Hi3516D V300 platform to illustrate the boot process. During this process, the init process reads the required fstab information, creates a block device node, and mounts it to the required partition. The following provides the key code snippets and log information as reference for debugging.
- > ![icon-note.gif](public_sys-resources/icon-note.gif) **NOTE**
-
- > The code snippets below are exhibited in the logical sequence. They are not neighboring to each other in the source code.
+ > **NOTE**: The code snippets below are exhibited in the logical sequence. They are not neighboring to each other in the source code.
1. Obtain required device information.
```
diff --git a/en/device-dev/subsystems/subsys-usbservice-guide.md b/en/device-dev/subsystems/subsys-usbservice-guide.md
index fb1e9c7c4631bd175de060a65377c12855000828..8f95d32cb3f671474f961ffc728729a86585c6dd 100644
--- a/en/device-dev/subsystems/subsys-usbservice-guide.md
+++ b/en/device-dev/subsystems/subsys-usbservice-guide.md
@@ -34,8 +34,7 @@ int32_t et = g_usbClient.OpenDevice(device, pip);
5. Configure the USB interface.
```cpp
-ret = g_usbClient.ClaimInterface(pip, interface, true);
-**interface** indicates an interface of the USB device in **deviceList**.
+ret = g_usbClient.ClaimInterface(pip, interface, true); // **interface** indicates an interface of the USB device in **deviceList**.
```
6. Transfer data.