Yuanhai Ziping () is the first comprehensive and systematic book on the theory of Four Pillars of Destiny. The book was compiled by Xu Dasheng (å¾Â大åÂÂ, aka Xu Ziping , hence the book's name) of the Song dynasty of China. It is a recording of various Zi Ping's fortune-telling methods. The method involves manipulation of the Four Pillars, each consisting of the two Chinese characters for the date and time of a person's birth (alternative name "eight characters" å «å Ba Zi).
The names of the book's chapters are: