According to the regulations of China UnionPay, China UnionPay Express APP only supports debit cards with the same name to repay credit cards, that is, it can only use its own debit card to repay credit card arrears. This is to ensure the safety and legality of funds and avoid risks and disputes in the process of credit card repayment. Therefore, China UnionPay Express does not allow users to use this service to repay other people's credit card debts.