Tao Te Ching is a Taoist classic and an important source of Taoist philosophy. The author of Tao Te Ching is Lao Zi, the founder of Taoist school, also known as Lao Zi and Lao Zi's 5,000 articles. Tao Te Ching is divided into Tao Te Ching and Tao Te Ching. The book tells the Taoist thoughts of self-cultivation, governing the country, using soldiers and keeping in good health.

The theme of Tao Te Ching is "Tao is natural". "Taoism is natural" is the essence of Laozi's thought in Tao Te Ching. As the most abstract concept category in Tao Te Ching, "Tao" is the source of power to create everything in the world. "Virtue" is the development and expression of "Tao" in the field of ethics. "Tao" and "law" have similarities in rules and common sense, but they are different from western natural law. "Law" should imitate the way of nature and play a role in the reverse transformation of syndrome differentiation.