Credit cards will be blocked under the following circumstances:

1. The cardholder is suspected of cashing out the credit card and is detected by the bank's backend and the card will be blocked.

2. If you frequently make late repayments, the bank will conduct risk control and block your card.

3. If you swipe your card at a POS machine that has a code that is set or skipped, it is easy to be blocked by bank monitoring.

4. When applying for a credit card, if the information is submitted through an intermediary, the bank will directly block the card if it is discovered.

5. If the same credit card has transactions on two or more terminals within half an hour, the card will be blocked if detected.

6. The card will be blocked when there are abnormal transactions, such as transactions still occurring after normal business hours.