When WeChat returns the credit card, it will charge a handling fee of 0. 1% of the repayment amount, with a minimum of 0. 1 yuan per transaction. When general users make credit card repayment, the credit card repayment fee will be paid together with the repayment amount. For example, if someone's current credit card bill is 1000 yuan, the repayment fee should be:1000 * 0.1%=1yuan.