The Jiuxing xuefa 九星穴法 "Methods of [discovering the influence of] the Nine Stars on cavities" is a book on geomancy (fengshui 風水) allegedly written by the Song period 宋 (960-1279) master Liao Yu 廖瑀, courtesy name Liao Boyu 廖伯禹. It is said that at the age of 15 sui he knew the five Confucian Classics by heart, and was therefore dubbed Liao Wujing 廖五經. As a geomancer he was able to detect a bonanza, and therefore adopted the style Jinjing shanren 金精山人 "Mountaineer of the gold essence".|
The 4 juan "scrolls" long book Jiuxing xuefa describes the influence of the "Nine Stars" or Planets (jiuxing 九星) on the energetic nodes (xue 穴, literally "cavities") that are auspicious spots in landscape. The Nine Planets are the sun (taiyang 太陽 "Great Yang"), the moon (taiyin 太陰 "Great Yin"), Venus (jinxing 金星), Mercury (shuixing 水星), "Purple Energy" (ziqi 紫炁), "Heavenly Funds" (tiancai 天財), the trinity "Concave Brain" (aonao 凹腦), "Double Brain" (shuangnao 雙腦), and "Flat Brain" (pingnao 平腦), and the constellations Tiangang 天罡 and Zaohuo 燥火. All these "planets" are effecting nine functions and shapes in the landscape that are compared with the human body, namely "regular corpus" (zhengti 正體), "open mouth" (kaikou 開口), "hanging breasts" (xuanru 懸乳), "curved legs" (gongjiao 弓腳), "double arms" (shuangbi 雙臂), "single limbs" (dangu 單股), "inclined brains" (cenao 側腦), "boneless spots" (mogu 沒骨), and "flat faces" (pingmian 平面). For each of these relations, the Jiuxing xuefa provides annotated illustrations. The author makes the important point that negative forms can be changed into auspicious ones. Edges and points in the landscape, for instance, can be changed into round forms that are not poisonous but auspicious.
The author represents the interesting view that man is not influenced by the energies of the landscape, but quite the contrary, the energetic form of the landscape can be influenced by man. This is possible by chosing one auspicious point, from which the surrounding can be changed to such an extent that even less auspicious matters can be transformed into positive ones. This method has been praised by some experts, while others doubted that such a transformation is possible.
The origins of the book Jiuxing xuefa are very obscure, and it might be that the real author was someone else than Liao Yu. The scholarly approach of this book is also somewhat heterodox. It is, nevertheless, included in the collectaneum Dili daquan 地理大全.
Source: Li Xueqin 李學勤, Lü Wenyu 呂文鬰 (1996). Siku da cidian 四庫大辭典, vol. 2, p. 1786. Changchun: Jilin daxue chubanshe.