You cannot modify the city user name, but you can modify the address, QQ, mobile phone number, login password, age and other related personal data 1. Click My 58 Option 2 at the top of the page. Click the Personal Data option at the bottom of page 3 in the User Center. Find the option to modify the data under page 4 of personal data. Modify the personal data you want. Note: The user name cannot be modified by 5. After modification, click finish modification option, and you can do it.