1 level risk control is to remind you of the norms and safety of recent trading patterns.

The secondary risk control is to prompt the recent abnormal card use behavior and keep the recent consumption voucher.

Three-level risk control is to prompt the existence of abnormal card use behavior, standardize card use, keep all recent consumer transaction vouchers, and give early warning to subsequent improper card use behavior, and take risk control measures such as freezing and terminating credit cards.

Four-level risk control means that the content of the short message indicates that there is a false transaction in the credit card. If you don't pay attention to using the card, the bank may re-evaluate the card amount.