1. First, open the Barley app and click "My" at the top of the homepage to enter the "Personal Center" page.

2. Secondly, on the personal center page, click "Account Information" to enter the "Account Settings" page.

3. Finally, on the account setting page, click "Bind Bank Card" and a new page will pop up. Select the bank card type as credit card, enter the information, and click Bind.