It is impossible to lose five pounds in four days, even if it is reached, it will be harmful to your health. I suggest you take your time. When you are overweight, you can start with brisk walking, sit-ups and other exercises, and gradually increase the amount of exercise. In dietotherapy, do not eat snacks and junk food, reduce the intake of staple food and fat, and eat more vegetables to ensure nutrition. Brunch can be eaten normally, and dinner can be replaced by fruits, red beans and glutinous rice flour in moderation. Never eat anything after eight o'clock.