1: Cardholders can be guaranteed to handle credit cards from other banks, provided that there are no bad records and the existing credit cards have been used for more than 6 months (statements of the last few months are provided).

You can't use anyone other than the cardholder to guarantee the credit card.

3. If you want to apply for a credit card, you need to provide: social security card (generally more than six months, some banks can approve it for more than three months), real estate license, driving license, personal income certificate issued by the unit, bank payroll, individual business license, etc. One or more, apply to the bank.