The steps of Alipay mobile phone client APP repayment are as follows:

1. Log in to Alipay client, click "Credit Card Repayment", and then click "Add Credit Card" to add someone else's credit card.

2. Fill in the credit card information to be repaid and complete the submission. Select the newly added credit card for repayment.

3. select the input field to fill in the amount, click "confirm repayment", and then select the payment method (balance treasure, balance and bank card).

4. Click "Pay Now" and finally enter the payment password to complete the credit card repayment.