Building dams before the floods arrive will prevent diseases before they arrive. Instead of seeing a doctor when you are sick, it is better to practice hygiene when you are not sick. Wash clothes and bathe frequently, and you will stay healthy without getting sick. It is more important to be cautious when disasters come from the mouth, and it is more important to be clean when diseases come from the mouth. Prevent diseases from entering through the mouth, and maintain good health to extend your life. A simple diet can nourish a person, and a moderate diet can reduce diseases. Overeating is easy to make you sick, so take it regularly to keep your body healthy. The seedlings are free from pests and grow vigorously, and the people quit smoking and drinking and become strong. A bowl of mung bean soup on a hot day is a good way to clear away heat and relieve the heat. If you want to be strong and have fewer diseases, walk every day and do morning exercises. Exercise is like Ganoderma lucidum. If you keep exercising, you will live longer.