According to Xicai.com's inquiry, the more credit cards there are, the possible reasons are as follows:

The more credit cards there are, the more credit cards there are, because users do not choose to repay in full when repaying each installment. As long as they choose the minimum repayment amount or installment payment, the amount payable in the current period+the amount payable after the minimum repayment amount last month or the amount payable after installment, more and more credit cards will need to be repaid. However, unless the user stops using the card after repayment, as long as the card is still in use, it is normal to repay more. In addition to the above two situations, if the credit card is overdue, the system will also charge overdue interest, which will also lead to more and more credit cards.