To repay a credit card with Yipay: log in to Yipay mobile client, click "Repay Credit Card" on the homepage, enter the credit card interface for the first time, manually enter the card number to repay the credit card number, fill in the repayment information according to the page prompts, and submit the order. Pay. To learn more about service discounts, click the "official website" below and customer service 219 will answer your questions.