1. Open the little red book application and log in to the account.

2. Click the "My" tab and click "Settings" in the pop-up page.

3. In the settings page, find the "Account and Security" option, and then click Enter.

4. In the account and security page, slide down the screen and find the payment account option, and then click Bind.

5. The system will automatically verify your bank card information and prompt whether to verify it. If the verification is successful, click Finish to complete the binding.

6. When online payment is needed, select "Quick Payment" on the payment page, and then enter the password to complete the payment.