Right-click on the top avatar, click "Personal Settings", enter your own personalized signature in the "Personal Signature" column, and then click the "OK" button at the bottom to save.

Your name is Wan Yu, and each of you has a unique signature: The star universe hundreds of millions of years ago was shining with charming and dim light of stars, mysterious and vague.

I advise you to sign with your mobile phone. There have been cases where people were defrauded of thousands of phone bills. You can go to a stall in Qibao Town and spend 3 yuan to ask someone to design a personalized signature for you.