Banks will pay a return visit and promote customers who apply for cards. In fact, the large-scale use of credit cards is basically cash, not really used for consumption. The bank sees through this kind of thing but doesn't tell the truth, because if you use the POS machine to withdraw the money from your credit card, the bank will also earn your handling fee. Every time you charge 60 yuan 10000 yuan, there should be about 30 yuan in the bank.