According to data from Hualu.com, the reasons why credit cards cannot be used in the current transaction:

1. Abnormal transaction environment: The transaction environment does not support the use of credit cards for consumption, so naturally credit cards cannot be used. paid.

2. Card swiping skills: The traffic card of the POS machine has no traffic and cannot swipe the card for normal consumption.

3. Transaction limit: Credit cards have credit limits. When the cardholder uses a credit card to make purchases, the available limit of the credit card cannot be lower than the limit of a single transaction. If it is lower than or higher than the limit, consumption will not be possible.

4. Transaction password: If the transaction password is wrong, it will be locked three times in a row, which means the transaction is abnormal.