How can I log in before Yin's mobile phone number is changed?

1. Use the "account retrieval" function of Yin and Yang Master: on the login page, click the "account retrieval" button, and then follow the prompts to enter the registered mobile phone number and verification code, and the system will send a verification message to the mobile phone. You can retrieve the account by verifying the message.

2. Contact customer service of Yin and Yang Division: If you can't retrieve your account through the "Retrieve Account" function, you can contact customer service of Yin and Yang Division and provide relevant information such as registered mobile phone number to help retrieve your account.

3. Re-register the account: The account cannot be retrieved by the above two methods. You can try to re-register a new account with your new mobile phone number.