The reasons leading to this situation are as follows:

1. The account was detected by the backend as having illegal card use.

2. If the password is entered incorrectly more than 3 times, the card will be locked.

3. If the credit card is overdue for 2 to 3 months and has not been repaid, the bank will lock the credit card.

4. The bank’s risk control system monitors the cardholder’s cash withdrawal behavior and locks the bank card used for cash withdrawal.