The ball court in the Temple of Heaven in Beijing is an ancient place to worship heaven, which is divided into three layers: upper, middle and lower. There is a circular stone slab (called Tianxin Stone) in the center of the superstructure, and nine fan-shaped stone slabs are built around Tianxin Stone to form the first ring, with nine pieces added to each ring in turn.
The first ring of the next floor is 9 more than the last ring of the previous floor, and each outward ring is also increased by 9 in turn. It is known that each layer has the same number of rings, and the lower layer has 729 more than the middle layer, so the three layers have fan-shaped slates (excluding Tianxin stone).
The dome is the place where the emperor held the winter solstice ceremony, also known as the Temple of Heaven. Located in the southern half of the Temple of Heaven, facing south, surrounded by red palace walls decorated with green glazed tiles, commonly known as "sub-walls", it was built in the ninth year of Jiajing (1530).
There is a door around the parapet. The north gate is called Cheng Zhen Gate, also known as Beitianmen; The East Gate is called Taiyuan Gate, also known as the East Gate; Simon is called Guanglimen, also called Xitianmen. The main entrance to the south is called Zhao Hengmen, also called the worse gate.
Every door is engraved with the house number of Man Han. The second word of each door name is arranged in the order of Yuan, Heng, Li and Zhen. "Yuan" represents the beginning of all things, and everything in heaven and earth is impartial; "Heng" is the flourishing of all things; "Benefit" is the combination of yin and yang of heaven and earth, so that everything is in its proper place; "Chastity" is to maintain harmony and impartiality between heaven and earth, so that everything can be stable and lasting.
Extended data:
Mouqiu is the place where the emperor held the winter solstice ceremony, also known as the Temple of Heaven. The ball court was built in the 9th year of Jiajing in Ming Dynasty (A.D. 1530). The ball altar is the main building, including the ball, the imperial vault and its ancillary buildings, the kitchen, the three storehouses and the sacrificial pavilion, and the ancillary buildings include the service desk and lanterns.
In the Ming Dynasty, Waqiu was a three-layer blue glazed round altar, which was expanded in the 14th year of Qing Qianlong (A.D. 1749). The blue glazed table top was changed to a bluestone table top with mugwort leaves, white marble columns and columns. Every year, when the emperor offered sacrifices to heaven, he got off the sedan chair from the west, then stepped into Zhao Hengmen and entered Zhao Hengmen to go to the ball field.
A low wall surrounded by two layers of blue glazed tiles is called a fence. The wall on the first floor is square, which is called outside; The second floor wall is round, symbolizing "the sky is round and the place is round". In the middle is the altar (also known as the rooftop), the dome.
Baidu encyclopedia-Waqiu