1. Enter the backend management interface of Shanxi Campus Culture Public Account and enter through the WeChat public platform login portal.

2. In the background management interface, find the setting option and click to enter.

3. In the settings page, find the public account setting option and click to enter.

4. In the official account settings page, find the avatar option and click to enter.

5. On the avatar page, find the signature option and click to enter.

6. Enter your signature in the edit signature box and click Save to complete the signature operation.