Introduction of Ancient Constellations in China

In order to facilitate research, people divide the starry sky into several regions, which are called constellations. China has long divided the sky into three walls and twenty-eight nights. Historical records and official records are quite detailed. Sanyuan is the three areas around the north celestial pole, namely Ziweiyuan, Taiweiyuan and Tianshiyuan. The 28 accommodation points are distributed in 28 areas near the ecliptic and the white road, namely, 7 accommodation points in the east, 7 accommodation points in the south and 7 accommodation points in the west. The seven lodging houses in the East belong to the horn, sound, fork, room, heart, tail and dustpan; The seven nights that Nangong Suzaku belongs to are: well, ghost, willow, star, Zhang, wing and bird; The seven nights that Xigong White Tiger belongs to are: Kui, Lou, Wei, Chang, Bi, Gou and Shen; Gong Bei Xuanwu (tortoise and snake) belongs to seven nights: fighting, ox, female, emptiness, danger, house and wall.