Adding a credit card means that other savings cards with the same name can be added to the online banking operation, while canceling means contact and association, as shown in the following operation example of China Merchants Bank:

China Merchants Bank card and credit card are bound with automatic deduction function. If you want to cancel this binding relationship, you can log in to the popular version of credit card online banking to cancel, log in to the popular version, click Repayment Management-Automatic Repayment Settings, and then cancel.

If there is no online banking, you can go to the bank counter to handle business.