1, can't be used, there is a risk of swiping the card. When the bank thinks that your transaction is risky and that your card may be swiped, the card will display abnormality when swiping.

2. The limit of limit/single consumption limit exceeds the available limit of credit card. If the single consumption limit exceeds the limit, the credit card may be unsuccessful, prompting that the card is abnormal.

3. Frequent large-value transactions are suspected of cashing out, triggering the bank's risk control bottom line for large-value transactions, resulting in the card being locked. According to the new regulations of banks, large consumption refers to the consumption with a single credit card amount exceeding 20,000, which may be monitored by banks.

4. Too many wrong passwords have been entered. If you enter the wrong password more than 3 times in a row on the same day, you may be locked. If you swipe your card again, it will prompt that it is not normal.