This question has come up for me, so I will. I've put the exact method and process for helping to buy it below, so I hope it helps.

1. Open the home page of Meituan and select Takeout, as shown in the picture:

2. Come in and select the address in the upper right corner, as shown in the picture:

3. Then go on to select the new address, as shown in the picture:<

4. Enter your friend's shipping information, phone number and address here, as shown in the picture:

5. After you exit with the address, you'll be automatically redirected to where your friend's address is located, and select a burger restaurant to enter, as shown in the picture:

5.

6. After selecting the burger, click to checkout, as shown in the picture:

7. Finally, confirm the address, the information is correct, choose to submit the order, enter the password and click to confirm:

This is the success of the burger to the field of friends to buy the burger.

If you have other methods, welcome to leave a message in the comment section below.