The reasons why Alipay can't repay others with China Merchants Bank credit card and the solutions are as follows:

1. When using mobile phone Alipay to repay the credit card, the network speed is slow. You can connect a wifi device before operation.

2. The credit card of China Merchants Bank entered is incorrect or the user name is misspelled. You can recheck the comparison before adding and repaying the credit card.

3. If the balance of the default payment method is insufficient at the time of repayment, you can replace the bank card or Alipay with other balances for payment.

4. The entered Alipay payment password is incorrect or the number of errors exceeds 3 times, and it will take 24 hours to re-operate.