The specific steps are as follows:

The materials to be prepared are: mobile phone and WeChat.

1. first, open wechat, and click to open "avatar" in the upper left corner of me.

2. Then click to open the "More" option in the pop-up window.

3. Then click to open the "Personalized Signature" option in the pop-up window.

4. Then delete all the words in the pop-up window and click Save.