Qi Men Dun Jia Yuan Ling Jing

Commentators say that the theory of Dunjia originated from the Yellow Emperor and was extended to Lu Wang and Zhang Liang. Before the Han Dynasty, it was often scattered in other books. As for "Sui Shu Yi Wen Zhi", there were only 13 volumes of special books, and it was doubled in the Tang Dynasty. Zheng Yuan noted the theory of the Nine Palaces in "The Biography of Zhang Heng of the Later Han Dynasty", and "The Chronicles of Emperor Gao of the Southern Qi Dynasty" said: "The Nine Palaces include one, two, three, four, five, six, seven, eight, and nine. All have Tai. In the tenth month of the third year of Emperor Yuanzong's reign in the Tang Dynasty, Su Jiaqing, a magician, requested that a nine-gong altar should be set up in the capital: number five in the middle, one with nine shoes, seven on the right, three on the left, two and four on the top, six and eight on the bottom, and the talisman is in Dunjia. In the first month of the second year of Huichang, Wuzong, Zuo Pushe Wang Qi and other memorials were played. According to Huangdi's "Nine Palaces Sutra" and Xiao Ji's "Five Elements Dayi", "the water in the canopy of the Tianpeng hexagram in one palace becomes white", which is no different from the Yanxing of Qimen today.