How to explain that the five elements in the Book of Changes belong to the Tang Dynasty?

In the Five Elements Theory of the Book of Changes, the Tang Dynasty is considered as a "primitive" dynasty. This view stems from the "three to five changes" in the Zhouyi Shentongqi, which is more complicated. Through its changes, it has become a text of heaven and earth. Very much, it is the image of the world. "In this theory, the five elements and dynasties are linked together, and each dynasty corresponds to one of the five elements.

According to this theory, the Tang dynasty belongs to the earth, because the Tang dynasty is located after the Han dynasty in time, and the Han dynasty belongs to the fire virtue in the five elements. The Tang Dynasty inherited the fire virtue of the Han Dynasty and transformed it into earth virtue, which embodied the principle of five elements (namely, wood, fire, earth, gold and water).

In addition, the Tang Dynasty also embodied the principle of coexistence of the five elements when it established its capital. The urban layout of Chang 'an City in Tang Dynasty is a standard square, which echoes the soil in the Five Elements. At the same time, the emperors of the Tang Dynasty often used the image of "earth" to symbolize their dominance. For example, the emperor's clothes and the decoration of his palace often use yellow to symbolize the elements of the earth.

In short, in the theory of five elements in the Book of Changes, the Tang Dynasty is regarded as the "original" dynasty, which embodies the corresponding relationship between the five elements and the replacement of dynasties.