The ancients said that "man has three treasures, essence, qi and spirit". Huangdi Neijing also said, "Therefore, saints preach the spirit, serve the weather and connect with the gods. If you lose, you will close your nine orifices inside, and the muscles in outer space will dissipate. This is called self-injury, cutting off the gas. " The Essentials of Internal Skill Training by Huan Wen in Minghu. The essence of health care says that "the vitality is solid and you don't think about diet; Yuan Shenhui, do not think about sleeping; Jing yuan is full and has no desire. " The three elements are complete, and the earth is immortal, which means that essence, qi and spirit are the necessary elements and material basis for maintaining human life activities. If the "three elements" are insufficient, it will lead to premature aging, and a series of premature aging symptoms such as mental fatigue, weak waist and knees, aging face, white teeth, decreased resistance and decreased sexual function will appear. If the "three elements" of the human body are sufficient, we can keep strong, energetic, quick-thinking and prolong life.