Find the small icon you want, press and hold the small icon in the input box and copy it.

If you can't find a satisfactory icon in Xinwei, you can try to find it on QQ, as shown below.

If you are looking for emoticons, you can't use the rest. If you can't find something satisfactory on QQ, you can look for it on Michao, Yixin or some other software. You can use any emoji icon. Of course, you can also copy the icon when you see a friend.

After copying the satisfied small icon, return to WeChat to set your own name.

Long press the input box, paste the small icon just copied into the name, and save it!