update en/device-dev/guide/device-clock-guide.md.

Signed-off-by: Nking_he <6384784@qq.com>
Signed-off-by: Nking_he <6384784@qq.com>

en/device-dev/guide/device-clock-guide.md

@@ -17,9 +17,9 @@ Download and install DevEco Studio. For details, see the  [HUAWEI DevEco Studio
 
 ## How to Develop<a name="section19901741111312"></a>
 
-The Clock app displays the current time through a clock face and numbers.
+The clock app displays the current time through a clock face and numbers.
 
-As shown in  [Figure 1 Clock display effect](#fig7763172132019), the UI consists of two parts:
+As shown in [Figure 1](#fig7763172132019), the UI consists of two parts:
 
 -   Clock face area: displays a dynamic analog clock whose hands rotate accurately.
 -   Digital time area: displays the current time in numerals.
@@ -251,7 +251,7 @@ After finishing writing the app code, you need to sign and package the app befor
 
 ## Running on the Real Device<a name="section092721731511"></a>
 
-Before you install the app and run it on the development board, install the DevEco Device Tool by following operations provided in  [HUAWEI DevEco Device Tool User Guide](https://device.harmonyos.com/en/docs/ide/user-guides/service_introduction-0000001050166905). Burn OpenHarmony into the development board, and run it on the board. For details about how to build, burn, and run an image, see . After the image is running normally and the system is started properly, perform the following steps to install or uninstall the app:
+Before you install the app and run it on the development board, install the DevEco Device Tool by following operations provided in [HUAWEI DevEco Device Tool User Guide](https://device.harmonyos.com/en/docs/ide/user-guides/service_introduction-0000001050166905). Burn OpenHarmony into the development board and run it. For details about how to build, burn, and run an image, see [Standard System Overview](../quick-start/quickstart-standard-overview.md). After the image is running normally and the system is started properly, perform the following steps to install or uninstall the app:
 
 1. Obtain the HDC client from the following path:
 
@@ -289,15 +289,15 @@ Before you install the app and run it on the development board, install the DevE
    **\[Empty\]** is displayed in the output after the **hdc\_std list targets** command is run.
 
 -  **Possible Causes and Solutions**
-    1.  The device fails to be identified.
+     - The device fails to be identified.
 
        Check whether **HDC Device** exists in the universal serial bus device of the device manager. If **HDC Device** does not exist, the device cannot be connected. In this case, remove and then insert the device or burn the latest image for the device.
 
-    2.  hdc\_std works improperly.
+     - hdc\_std works improperly.
 
        Run the **hdc kill** or **hdc start -r** command to kill or restart the HDC service, and then run the **hdc list targets** command to check whether device information is obtained.
 
-    3.  hdc\_std does not match the device.
+     - hdc\_std does not match the device.
 
        If the latest image is burnt for the device, hdc\_std must also be of the latest version. As hdc\_std is updated continuously, obtain hdc\_std of the latest version from the **developtools\_hdc\_standard** repository in the **prebuilt** directory.
 
@@ -312,5 +312,3 @@ Before you install the app and run it on the development board, install the DevE
 -  **Possible Causes and Solutions**
 
    **hdc\_std.exe** requires no installation and can be directly used on a disk. It can also be added to environment variables. Open the **cmd** window and run the **hdc\_std** command to use **hdc\_std.exe**.
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