After clicking it, register an account, enter your account number and password, and after entering, click to enter the game, wait for a while, and the initial interface of the game will open.
After you come in, a person named Chihiro Sugiyama will talk to you. Just listen to her. After about five minutes, you will get to a milk tea shop (it looks like this).
In the next stage, Qianxun still guides you to do most of the tasks. As you complete more and more tasks, you will unlock more functions. When you have a certain reputation, you can upgrade.
