From the Book of Changes: "The metaphysical refers to the Tao, while the metaphysical refers to the device". Metaphysics refers to the rationality behind the perceptual world, which is abstract and intangible and exists as the foundation of the perceptual world.
Metaphysics means that thinking and macro belong to the category of emptiness; Metaphysics refers to understanding things to the extreme and being rigid. Laozi has a saying that "the metaphysical refers to the Tao, and the metaphysical refers to the device", which means that metaphysical things refer to the Tao, which refers to both philosophical methods and thinking activities. Physically, it refers to concrete and tangible things or cultural relics.
Zhouyi is the theoretical source of natural philosophy and humanistic practice in China's traditional ideology and culture, the crystallization of China's ancient thoughts and wisdom, and is known as the "source of Tao". The content is extremely rich, which has had a far-reaching impact on China's politics, economy, culture and other fields for thousands of years.
During the Spring and Autumn Period, official schools began to evolve into private schools. There is a gradual development before and after the Yi-ology, and a hundred schools of thought contend, so it is easy to divide. Since Confucius praised the Book of Changes, the Book of Changes has been regarded as a Confucian classic and the first of the Six Classics by Confucianism. In addition to Confucianism, there are two schools of Yi-ology and Confucianism-Yi-Yi, which develop in parallel: one is Yi-ology, which still exists in the old forces; The other is Laozi's Taoist Yi, which began to be divided into three branches.