1. Check whether the balance of the binding card is sufficient; 2. Check whether the bound bank card is reported lost, frozen, cancelled or set repayment/transfer limit; 3. Ask your card-issuing bank whether it has handled other loan business, which leads to the conflict of deduction; 4. Check whether the card number of your bound bank card is consistent with the selected issuing bank; 5. Check whether the "China Post Wallet" APP or network signal is abnormal, log in again after logout, and try to repay manually; 6. Manual repayment needs to stagger the withholding time.