This problem needs to be contacted first. Are all your relatives thin or fat? Because obesity is hereditary, if you want to talk about how to gain weight, I suggest you eat more sweets, eat less meals and exercise properly, mainly eating more meat and exercising more. Don't think that you won't gain weight after exercise. In fact, after exercise, your body will absorb a lot of nutrients from your body. If you eat too much at this time, you will gain weight quickly. This is estimated that all people who lose weight should understand.
The key is that eating sweets and sugar can make people fat, and drinking soup that tonifies qi and blood can make people rosy and ensure gastrointestinal absorption.