WeChat ID is a part of your account profile. It is your unique certificate. This is the code for contact to add you. When you first create your WeChat account your id will be compiled of random letters and numbers, I never understood why people chose to leave it as is, we don’t want you to have a robot name! Also, if you lost your phone you can retrieve it using your ID number. That is why you should make it easier to remember and catchy to make a good impression. Since it can be changed ONLY once a year, you should view this video and learn how to do it properly to create the BEST WeChat ID for you.
Have a great day, and Zai Jian,
Neta