Download and log in to the Payout Bar APP, then enter the "My" page, click on the icon of the customer service avatar at the top of the page, click on "Online Customer Service", enter "Credit Card Cancellation" in the dialog box and send it, in the reply Click "Click here" to cancel the credit card in the content. After the last number of the credit card that can be used for card cancellation pops up on the page, you can cancel the credit card after entering the last number of the credit card prompted. (Above steps operating system: Brand model: Xiaomi Mi10lite Zoom & Honor HONOR20YAL-AL00; System version: MIUI12.1.3&MagicUI3.1.0; Software version: Pay the bill APP4.7.3& Pay the bill APP4.7.3 )