Zhouyi is a precious document in China's cultural treasure house, which is divided into two parts: classics and biographies, and has great influence on the history of philosophy, thought, religion, literature, science and technology and medicine. According to the traditional view, "The Book of Changes" is that "people are more sacred and the world is more ancient", that is, "The Book of Changes" has experienced three periods: ancient times, middle ages and ancient times. It was completed by three saints, Fuxi, Wang Wen and Confucius, and it contains profound philosophy of life. Especially after the interpretation and development of the Book of Changes, its philosophical level reached a new height. It is for this reason that the Book of Changes was favored by the rulers of the Han Dynasty. From the original divination book to the official philosophy book of governing the country. Known as the head of the Five Classics and the source of the Tao. The Book of Changes holds that "Tao" is the noumenon of the universe, but he did not elaborate on "Tao". Laozi expounded and expressed his views in Tao Te Ching. At present, many people all over the world are talking about the Book of Changes and the Tao. The mysterious Book of Changes is a very precious cultural heritage in China and even the world. Its treasure has yet to be discovered and excavated, so that it can glow with more dazzling light.
Tao Te Ching is the most famous Taoist classic in China. Nan, a famous scholar, comprehensively explained and dialectically quoted the connotation of Tao Te Ching in The Theory of Old He Zi. Old He Zi's theory has the characteristics of conciseness and fluency, and has made beneficial explorations in popularizing China's traditional culture, making extensive and profound ancient books and professional academic popularization.