Take her to various outdoor activities, such as mountain climbing, outing, cycling, swimming, badminton and camping. Nothing is more relaxing and free than sweating, turning activities such as eating popcorn and watching movies into more interesting outdoor activities. Get rid of the habit of "taking you to eat delicious food", "I'll bring you snacks if you want" and "giving you a snack gift package on holidays". Usually, urge her to drink more water. It would be better if it was honey lemonade. Accompany her to buy more fruits, and let her get into the habit of eating less junk food at regular intervals for three meals. Don't mention barbecue hot pot for the time being. Within a month, your girlfriend will scream with joy.