Health preservation belongs to the category of preventing diseases in traditional Chinese medicine, which emphasizes nip in the bud. Healthy qi should be kept inside, and evil spirits should not be done, so the principle of health preservation is to strengthen the body and eliminate evil spirits. First of all, mental activity is the external manifestation of the five internal organs, and the liver governs emotions, so a good mood has a protective effect on the liver. Life lies in exercise. Regular exercise can maintain the circulation of qi and blood, promote the circulation of qi smoothly, and prevent the generation of blood stasis. Eliminating evil means strengthening the body. Irregular diet will damage the spleen and stomach, which is the foundation of the day after tomorrow, so nourishing the spleen and stomach is good for health, and a light diet is good for the spleen and stomach.

Chinese medicine believes that with the spirit of the sun, there is vitality. Keeping warm in winter and not eating raw cold drinks at ordinary times are good ways to protect the spirit of the sun. Kidney yin is the root of yin fluid, so careful sexual intercourse is good for the kidney.