1. First, open WeChat on the mobile phone and click Enter.

2. Enter the WeChat interface, click Discover below, and select the applet above to enter.

3. Search for a small program called "Surname Wallpaper Generation" in the search bar of the small program.

4. Then enter the "Surname Wallpaper Generation" applet, and you will see an interface where you can manually enter the text or generate it randomly.

5. After the final input, you can make an avatar with words.