Shanghai Bank's credit card repayment shows that the main reasons for the failure of bank card verification are as follows:

1. Incorrect bank card information input;

2. The status of the bank card is abnormal, and the bank card has expired, frozen or cancelled;

3. The bank card does not exist. This situation is likely to have forged bank cards, which are not recorded in the database of China UnionPay system. In other words, the bank has no data record of this card;

4. database network fluctuation;

5. The data information has not been updated to the main database. After the user changes the information, the banking system fails to update the data information to the General Administration of UnionPay in time, so the user needs to contact the person in charge of the platform for handling. Investment is risky, please make a careful decision.