1. Find the "Wallet" option on the mobile phone desktop and click to open it.

2. Find the "Default Card" option in the wallet interface and click to select.

3. Click the "Add Bank Card" option below.

4. Select the "I have read and accept" option.

5. Place the bank card on the back of the phone, and the system will automatically add the bank card.

6. Fill in the verification code received on your mobile phone and click the "Next" option.

7. After filling in the verification code, the addition can be completed.