The steps for replacing the bound bank card on the US group takeaway are as follows:

1. Open the mobile meituan APP and click "My" in the lower right corner.

2. On my page, click My Wallet.

3. After entering the new page, click "Bank Card".

4. On my bank card page, click the bound bank card.

5. On the details page, click Unbind.

6. After the unbinding is successful, return to the bank card page and click "Add Bank Card".

7. After entering the payment password in the pop-up page, enter the bank card number and cardholder's name to be bound.