Take "Mobile WeChat Version 8.0.28" as an example, just modify the personalized signature in more information of your WeChat.

1. Open the mobile phone WeChat message interface and click mine.

2. Click the arrow to the right of the avatar.

3. Click to enter more information.

4. Choose a personalized signature.

5. Enter the personalized signature you want to set in the horizontal line.

6. After entering the personalized signature, click Save.

Then, your WeChat personalized signature is set.