2. In this page, find the word "payment" and click to enter the payment page!

3. At the top of the payment page, find the "Collection" command and click to enter the collection page!

4. After entering the page, the QR code of the usual payment will be displayed. Below the code, "change" will be displayed in the payment method position with a text prompt "pay by payment method first"!

5. Click on the "small corner sign" next to the change, and the prompt "Select preferred payment method" will pop up on the page! Find the credit card you want to set below, and click!

6. After clicking, the prompt page will automatically close, and the lowest priority payment method will become these credit cards!

7. Of course, when you pay for shopping, the system will automatically use this credit card to pay! If you don't want to use this credit card, you can also change it to other payment methods through the above methods!