Sun Simiao, a medical scientist in Tang Dynasty. Noble medical ethics, helping others. Sun Simiao's achievements are not only reflected in medicine, but also in health preservation. He summarized, absorbed and used for reference, and put forward his own innovative views on the basis of predecessors' thoughts. From a medical point of view, he advocates both rest and exercise; Advocate both food supplement and drug treatment; Advocate semen preservation and abstinence.

In particular, his "ten elements" of health preservation are highly respected by future generations, and many health preservation concepts have been developed on this basis. The ancients believed that people had "three treasures", essence, qi and spirit. God takes essence as the root and qi as the use, which is a symbol of human life. Sun Simiao compared human life to a burning oil lamp.

Life is only a hundred years, and the years are in a hurry. The big urn has a short lighting time and the small urn has a long lighting time. However, proper care can prolong life. He pointed out that "people's longevity lies in squatting", that is, cherishing the gods and protecting their own "three treasures". On the basis of increasing spirit, he summed it up as "twelve less", that is, "people who are good at managing their lives often think less, want less, talk less, laugh less, feel less sad, worry less, be less happy, be less angry, be less good and be less evil. Everything is the same.

"On the contrary, there are more than 12 people, and there are many concerns about hurting people." Rejecting the outer edge not only eliminates all distracting thoughts, but also reaches the realm of "the relationship between form and spirit" Nourishing the mind means nourishing nature. Only by controlling worldly desires and achieving a state of peace of mind can we live a long and healthy life. The method of "controlling the atmosphere according to the time" pays attention to the communication between man and nature. The qi of human body is closely related to the natural qi of heaven and earth. There are four seasons in the sky, and people also have changes in spring, summer, autumn and winter. So he put forward the spirit of keeping in good health in spring, keeping in good health in summer, saving in autumn and storing in winter. People's food, clothing, housing and transportation change with the seasons. Moderately adjusting the changes of food, clothing, housing and transportation can achieve the function of regulating the balance of qi, blood and yin and yang.