In order to predict the good or bad of the world with the change of astronomical phenomena, ancient astrologers corresponded the starry sky area with the countries and states on the ground, which was called the dividing line. Specifically, it is to regard a star as the dividing line of a country, a star as the dividing line of a state, or conversely, regard a country as the dividing line of a star and a state as the dividing line of a star. For example, Wang Bo's Preface to Wang Tengting: "Zhang Yu is the old county, and Hongdu is the new house. The stars spread their wings and meet Lu Heng. " In other words, Nanchang, Jiangxi is located on the dividing line between Yisu and Suye. Li Bai's Shu Dao Nan: Panting, we brushed Orion and crossed the well star. Then, we held our chest with our hands and groaned, and collapsed to the ground. Betelgeuse is the dividing line between Yizhou (now Sichuan) and Yongzhou (now most of Shaanxi and Gansu), and the Shu Road spans Yizhou and Yongzheng. Visiting a well means that Shu Dao is on the extremely high mountains of Yi and Yong countries, and people have to raise their heads and touch the stars in the sky to reach it.
Twenty-eight hostels and China are divided as follows.
Star kingdom
Jiao kangzheng
Frontier defense Song Xin
Tail-tailed swallow
Bullfighting month
Nvwu
Shortage and danger
Ventricular wall protection device
Kuilou road
The stomach is full of Wei.
a surname
Jing Qin Gui
week
Wing Chu
Star state
Jiaokang Bianyanzhou
Fang Xin Yu Zhou
Wikiyouzhou
Travelling around, making a living
Niunv Yangzhou
Virtual danger Qingzhou
Bing state of ventricular wall
Xuzhou kuilouwei
Longbijizhou
Shen Qian a week
Yongzhou, Gui Jing
Zhang Liuxing Sanhe
Yizhi Jingzhou