In terms of diet, you should eat seven points full, no fried food, no sweets, no high-fat food, no snacks, no junk food, less staple food, more fruits and vegetables, and you can eat boiled eggs, chicken breast and beef. Dinner should be light.
Exercise can choose running, cycling, skipping, yoga and so on.
You won't gain weight in a short time, and you need to lose it gradually. It is unhealthy to lose weight quickly. The important thing is to persevere. As long as you follow the above method, the waist circumference will become thinner and better.