Losing weight without spending money is exercise. You can play if you can't control it well, which requires a lot of exercise and a certain amount of food control. Recommend a Copenhagen cookbook. 13 days, you will lose different pounds due to different constitutions. There is also fasting, asking you not to do strenuous exercise, because you will feel dizzy. After fasting, you should slowly resume eating for a long time. In fact, in the end, you have to control your mouth and be particularly cruel to yourself. If you are not particularly fat, it is recommended not to lose weight during this period, which will affect your physical growth ~ sauce will be fine ~