This card cannot be used. There are several possibilities: 1, the chip or magnetic stripe is damaged. 2. The card is locked (the card password is entered incorrectly for many times, and the online payment information is locked, etc. The line has been used up. This card has expired. After a long overdue period, the limit may be halved or zero. 5, bank or merchant system problems (such as banking system maintenance, this situation is relatively rare. Poor POS network, etc. )
Of course, you need to consult customer service for specific reasons. Call the customer service hotline as soon as possible.