First, the card status is abnormal, such as degaussing the card, inactivating the card, too many password locks, and the card has expired. It is recommended to call the customer service hotline of CCB for confirmation;
Second, there is no problem with the card, but the POS signal is not good, and the failure to connect to the network will also lead to the failure of swiping the card;
Third, if the cardholder holds an IC chip credit card, because UnionPay has turned off the downgrade transaction function, if the cashier still operates the transaction by swiping the card instead of inserting the card, it will not be available.