Laozi, Lao Dan, also known as Li Er. Chu County, Chu State (now Lu Yi, Henan). Laozi was a philosopher in the pre-Qin period and the founder of Taoist health preserving thought. The Historical Records says, "I am in my sixties, or in my twenties, practicing Buddhism for a living." Du dialect in Han Dynasty: "Laozi cultivated his nature with clumsy fire and lived for hundreds of years." Laozi is a well-educated and long-lived health-preserving family respected by health-preserving families in past dynasties. The idea of keeping in good health put forward in Laozi has the greatest influence on later generations.

(1) to control the chaos, hold the yuan and keep one.

Laozi regards "don't do anything, treat it without disorder" as an important thought of health preservation, and puts forward some health preservation principles such as "taking medicine early, accumulating" and "holding the yuan to keep one". The viewpoint of "taking medicine early" is the same as that of "preventing diseases" in traditional Chinese medicine, that is, the viewpoint that modern medicine focuses on prevention refers to early health preservation, daily health preservation and perseverance, and the "virtue" of health preservation is accumulated, which is called "heavy accumulation". This is Lao Tzu's "early service is more important than morality" ... which means a deep-rooted and long-lasting way. Laozi's theory of health preservation holds the view that "the sage is the best in the world". "One" is the way to keep in good health. Later generations of health experts also called "one" qi and "primordial energy", and used it to guide internal qigong, that is, to be convinced and nourish qi, to look inward, to accept qi to the root, to reach the elixir and to nourish fetal interest. Adhering to the principle of "yuan and keeping one" also refers to the spirit of "keeping god", which has become the guiding ideology for ancient health experts to create and apply various health-keeping technologies.

(2) natural inaction, return to nature

Natural inaction is the highest realm of Laozi's Taoist thought and health preservation. It emphasizes the natural method of keeping healthy and nourishing the heart, eliminates the confusion of artificial addiction and returns to simplicity. The so-called "simplicity, less thinking and less need" returns to the simplicity and purity of nature, and then achieves harmony and unity with all things in nature. Truth is a natural and artificial synonym for element, light, clarity, quietness, purity and simplicity. The idea of "indifferent to nothingness, obeying the true qi, hiding the spirit inside, and preventing diseases" in Neijing came from this. Chinese medicine pays attention to dieting, frugality, abstinence and mental adjustment, all of which stem from the thought of "natural inaction"