The theory of ancient naivety comes from the first article of Huangdi Neijing Su Wen, which is a supplementary explanation to the origin and characteristics of Huangdi Neijing. The beginning of medicine has been the first important paper that Huangdi and Qi Bo talked about how to achieve the goal of health and longevity since ancient times.
Firstly, this paper discusses the specific reasons why the ancient people who were born naturally and didn't have any man-made chores could remain old for a hundred years, and then talks about the growth and development process of human life, emphasizing the important role of kidney qi, healthy qi and true qi in the human body. Finally, they listed the ideal artistic conception of life such as real people, wise men, saints and sages.
The yellow emperor said: I heard that there were real people in ancient times, holding heaven and earth, grasping yin and yang, absorbing essence, and guarding God independently. If their muscles are integrated, they can live a long life in heaven and on earth. When there is no end, this is the way of life. In the Middle Ages, there were people who were all-powerful in virtue, harmonious in Yin and Yang, four seasons in tune, died of vulgarity, concentrated their attention, traveled between heaven and earth, extended their audio-visual reach and benefited for a lifetime, and the strong were also real people. Secondly, there are saints who are in harmony with heaven and earth, and from the theory of eight winds, they are secular.
If you don't feel angry, you don't want to leave this world, you are served, you don't want to look vulgar, you don't want to work hard outside, you have no thoughts inside, you take pleasure as your service, you take pride as your work, you don't want to have a good state, you can count on it. Secondly, there are sages who govern heaven and earth, such as the sun and the moon, distinguish the stars, keep yin and yang, and contract with the Tao from ancient times at four o'clock, which can also prolong life.