Because the debit order can be set in Alipay, when the credit card comes before the debit card, the credit card will be used for payment.

when paying by credit card, it's only on the premise that merchants have opened credit cards to collect money, so when paying individuals with Alipay or merchants who have not opened credit cards to pay, they will pay with the money in their debit cards, which is why Alipay scans the code and sometimes pays by credit cards and sometimes by debit cards.

in order to avoid paying by credit card without knowing it, which will affect your credit information, you can transfer the debit order of Alipay to the back in Alipay.

1. open AliPay on your mobile phone, enter mine, and click settings in the upper right corner.

2. in the settings interface, there is a payment setting.

3. The top of the payment settings is the deduction order. Click to enter.

4. You can see all the payment channels of Alipay here.

5. Click the icon on the right to adjust the payment order.