CCB mobile banking needs to add the credit card account information before it can be queried, which is not automatically bound. After logging in to mobile banking, click "My Account", click "Add New Account" below, select "Credit Card", and enter the credit card information (card number, expiration date, verification code, etc.). After that, you can check the credit card status in mobile banking. In the future, every time you add a credit card, you need to add it manually. If the operation is correct, it still doesn't work. Look at the error message and record it. You can ask the customer service or tie it at the outlet.