Moving without extremes is Tai Chi. Tai Chi is divided into Yin and Yang. It is two instruments. The two instruments circulate. Yin and Yang each form two images - Shaoyang, Sun, Shaoyin and Taiyin, which together form four images. , Yin and Yang intersect, and become Bagua. The two hexagrams complement each other, resulting in sixty-four hexagrams.
In a philosophical sense, Wuji leads to the Bagua, and the Eight Trigrams leads to the Sixty-Four Hexagrams. It tells the basic principles of the development of things and the transformation of contradictions. It is a simple dialectics. The five elements of metal, wood, water, fire, and earth describe the macroscopic form of all things in the world and are simple materialism. As for the embodiment of the Four Symbols and Bagua into directions, seasons, stars, water and fire, heaven and earth, wind and thunder, mountains and rivers, it is nothing more than the ancients grafting abstract dialectics and concrete materialism into each other.
As for Tao giving birth to one, giving birth to two, two giving birth to three, and three giving birth to all things, it is the same thing as Wujizhizhibagua, which is the evolution law of things from simple to complex; here one, two and three are all It is an abstract concept, just the accumulation of quantity, and then qualitative change occurs through quantitative change, without specific reference.