When using the app payment code to pay, an option will pop up. Simply select the bound credit card to complete the payment.

Open the China Construction Bank app on the desktop of your mobile phone, click "Home" in the lower left corner, and click the dragon payment icon in the upper right corner after the page jumps. Enter the new page and click Life at the bottom of the page. After the page jumps, click More in the upper right corner. Enter the new page and click Scan. After entering the new page, you can scan the QR code to pay. You can also save the QR code to the mobile phone album and scan the code to select credit card payment