If it is risky, such as frequent consumption in China, and if there is a large overseas transaction suddenly, the bank will think that the credit card is at risk of being stolen, so in order to reduce losses, the card will be blocked. The reasons for overdue card closure may be that the card has not been repaid for three consecutive months, it has been blacklisted by the bank, and the account has been used by money laundering, fraud, terrorist financing and other illegal acts.