The user name of Aliwangwang account is the user name of Taobao account or Ali account (that is, the name used for member login). Once the registration is successful, it cannot be modified. If you are not satisfied with the user name, you can contact Ali/Taobao customer service to cancel the account and then reapply for a new account and fill in a satisfactory user name. The nickname on Aliwangwang (the name displayed when chatting with others on Aliwangwang) can be modified