The "fast credit card payment" business provided by banks can be divided into two modes: "fast large payment" and "fast small payment" The single transaction amount of fast small payment must be less than or equal to 500 yuan RMB, and the single transaction amount of fast large payment can be greater than 500 yuan RMB (the upper limit of single transaction depends on the partner). The fast payment mode is agreed by the third-party payment platform and the merchants it cooperates with, and the cardholder cannot choose by himself. Alipay will prompt the limit when the cardholder pays quickly.