the transaction of the supplementary card of Minsheng bank's credit card is included in the bill of the main card, and a bill is issued, and the repayment can be returned to the main card or the supplementary card. The repayment methods are as follows:

1. Cash repayment: customers can bring enough cash to the counter of Minsheng outlets or self-service ATM machines and deposit the cash into the credit card to be repaid.

2. online banking repayment: customers can log in to online banking, bind their credit cards and transfer money.

3. repayment by mobile banking: the customer downloads and installs the Minsheng bank APP, clicks "credit card"-"I want to repay" on the home page, and can repay the loan according to the instructions on the page.

4. Third-party platforms: There are many third-party payment platforms (WeChat, Alipay, etc.) that support credit card repayment, and customers can use these platforms for repayment.