The iPad has been bound to a bank card. The cancellation operation is:
1. Click "Settings" on the main interface of the device.
2. Open "iTunes? Store? and App? Store".
3. Click "?Apple?ID". If you are not logged in to your Apple account, you need to log in. (Please ignore if you are logged in with an Apple account)?
4. Click on the account to display the selection interface, and select "View Apple ID".
5. After entering the password, select "OK".
6. Enter "Account Settings", click to select "Payment Information", set up a bank card after entering, and select "None":