What do the three walls symbolize?

The ternary symbol is Ziweiyuan, Taiweiyuan and Tianshiyuan.

Together with the twenty-eight hotels on the ecliptic, it is called three yuan and twenty-eight hotels. Compared with the constellations of modern astronomy, the range of star officials is smaller and the number is more, so ancient astronomers in the Han Dynasty divided the star officials into larger areas such as three walls and twenty-eight houses.

In ancient China, in order to know the stars and observe the astronomical phenomena, the stars in the sky were divided into several groups, and each group had a name. Such a group of stars are called star officials. Each star officer contains a number of stars ranging from one to dozens, and the scope of the sky area is also different.

Among the numerous star officials, 365,438+0 occupies a very important position, that is, three walls and twenty-eight accommodations. In the Tang Dynasty, the three yuan and twenty-eight nights developed into the ancient star division system in China, similar to the constellations in modern astronomy.

Taiwei Courtyard is the upper wall of Sanyuan, located in the lower northeast of Ziwei Courtyard. There are 10 stars in the south of Beidou, in the north of Yachongzhou and Yisu, which are fan-shaped and centered on the Five Emperors. Dong Fan's four stars, starting from the south, are called East Upper Phase, East Sub-Phase, East Sub-Phase and East Sub-Phase (namely Virgo γ, δ, ε and backward 42).

Xifan 4 stars, from south to bottom, are called West Admiral, West Admiral, West Sub-phase and West Upper Phase (namely Leo σ, ι, θ, δ); South Francisco 2 stars, the east is called left law enforcement (that is, Virgo η), and the west is called right law enforcement (that is, Virgo β). The name of Taiweiyuan first appeared in Xuanxiang poems in the early Tang Dynasty.

It covers an area of 63 degrees in the sky and is centered on the emperor. * * * contains 20 constellations, 78 main stars and 100 additional stars. It contains a part of constellations such as girls, latecomers and lions. Too small is the meaning of the government. Stars are often named after official names, such as Ting Wei, left law enforcement officer and right law enforcement officer.