Wuxing and Compatibility Coefficient: Part I
Wuxing (五行) is a very fundamental concept in Chinese fate calculation. Some scholars believe that wuxing originates from the planetary motion of the five planets visible to the naked eyes, namely Mercury, Venus, Mars, Jupiter, and Saturn. In the Chinese literature, the term wuxing first appeared in a war declaration when Qi (启), the second King of the Xia Dynasty, was preparing to launch a war on the tribe of You Hu (有扈). Shang Shu: Gan Shi (The Declaration of Gan)《尚书·甘誓》: The tribe of You Hu insulted the wuxing and muddled the correct calendrical order. It is the heaven will that they must be destroyed. I am now to dutifully carry out my heavenly duty to punish them. (有扈氏威侮 五行 ，怠弃三正，天用剿绝其命，今予惟恭行天之罚。) In this text, the term wuxing was not defined. It is possible that the author of the declaration meant to use the term wuxing in its planetary sense or `heaven' in general. The first discussion of Wuxing can be found in Hong Fan (洪范). When Ji Fa (姬发) destroyed the Shang Dyn