As long as your postal credit card is in normal condition and the credit limit is sufficient, businesses that support flash payment can use it. China UnionPay has no limit on the daily flash payment times of credit cards.

However, in order to ensure that personal credit will not be affected, we must pay attention to the time when paying by credit card, and it is best to conform to people's daily consumption rules, and the flash payment should not be a big integer (1000 yuan).