1. open AliPay APP and log in to your account.

2. find the "service" option in the navigation bar at the bottom of the home page and click enter.

3. enter "McDonald's" in the search box on the service page, and click search or select relevant recommendation results to enter the McDonald's applet page.

4. at the top of the McDonald's applet page, click the "register" or "login" button.

5. according to the prompt, enter the mobile phone number and click the "get verification code" button to get the verification code and enter it.

6. Enter and confirm the password, and set the account login password.

7. Fill in personal information, including name, gender, birthday, etc., and then click "Next" button.

8. Read and agree to the relevant agreements and terms, and then click the "Register" button.

9. After successful registration, the system will automatically log in to the McDonald's applet account.