① The process of handling cards by card is relatively simple, but there are still certain requirements. If a cardholder wants to apply for another credit card through his existing credit card, he usually needs to hold the original credit card for more than 6 months before he can apply for another credit card in another bank. For some banks, the card processing time is relatively short. For example, ICBC credit card holders can apply for a card as long as they use the card for more than 3 months.

(2) Under normal circumstances, the cardholder can use the original credit card as proof of financial resources and show his original identity, so that he can apply for another credit card in another bank on the basis of the original cardholder's card. For some banks, if they want to handle the card business, they may also need to submit a copy of the applicant's ID card, a copy of the credit card, proof of economic source and other related materials.