1. Open the Onion Math app and select the "Register or Login" button at the bottom of the page.

2. After jumping to the "user registration" page, you can choose your own identity as a "student" or "teacher", and then register your username with your real e-mail/cell phone number. Then you can use your real e-mail/mobile phone number to register your user name, 6-20 digits or letters to set the login password, and then click "Finish Registration" to complete the registration. At the same time, you can also choose "QQ account login" to log in directly.