It mainly collects fees from merchants. For example, if you spend 100 yuan, the bank will give 99 yuan to the merchant. If you return 100 yuan to the bank, the bank will earn 1 yuan. The profit is huge! ! ! It’s super profitable, so I encourage you to swipe 6 times. The more you swipe, the more you win. The cost of a card is about 300 yuan. How long does it take to collect annual fees, hehe. The more you spend, the more the bank earns