Jiugong is a traditional cultural category in China. Tiangong is divided into nine equal parts: Gangong Palace, Kanggong Palace, Genggong Palace, Gong Zhen Palace, Zhonggong Palace, Gong Xun Palace, Gong Li Palace, Gongkun Palace and Dui Palace. At night, you can see the movement of seven obsidians and stars from the ground, and know the direction and season.
The oldest Nine palace map related to Shu Shu is Luo Shu, which is also an important concept in the traditional culture of China. Later it was used in divination, astrology and other fields. In fact, it is a number box with three rows and three columns. According to the law of Luo Shu, it can be formed by filling in 9 numbers from 1 to 9. The principle of Luo Shu is as Zhen Luan said in the Northern Zhou Dynasty: "Nine palaces, that is, two or four are shoulders, six or eight are feet, three are left and seven are right, nine are worn, and five are middle schools." .
Among the nine palaces, Gan, Kan, Gen and Zhen belong to Siyang Palace, Xun, Li, Kun and Dui belong to Jiugong, and Zhonggong * * * is Jiugong. Jiugong represents the earth and the earth in Daoism and is the foundation of Daoism. Taoism is divided into four parts: heaven, earth, man and god. Of the four plates, only the site does not move, and it will sit quietly.
The orientation of Jiugong and Bagua corresponds to: Yigongkan (north), Ergongkun (southwest), Sangong Town (east), Sigongxun (southeast), Wugong (middle), Liugonggan (northwest), Qigongdui (west), Bagonggen (northeast) and Jiugongli (south).