Get up every morning and drink a glass of light salt water or boiled water on an empty stomach. Remember to swallow it, which can stimulate gastrointestinal peristalsis and prevent constipation. Remember not to eat any food before. Prepare some eggs or tea eggs and eat one every morning. Then have a glass of milk. Don't eat buns and bread, which are high in calories and starch. Eat more vegetables and eat less at noon. The consequence of not eating at noon is easy to overeat at night. Of course, if you have strong willpower, you can skip meals and walk slowly on the playground after dinner. Don't sit or lie down immediately when you go back to the dormitory. Eating a banana 10 minute can promote digestion, that is, thin belly stovepipe.