Qu Wei's "Four pillars are detailed and true"
Qu Wei's Four Pillars and Multiple Images
Lecture notes of Qu Wei's four pillars advanced class
The mystery of Li Shunxiang's four pillars
Li Shunxiang's "Four Hurdles Training Course for Beginners, Middle School and Advanced Students"
Ancient Books Zi Ping Zhen Quan and Tian Tian Mu
You can refer to:
Li Hongcheng's book.
Shao Weizhong's Analysis of Four-pillar Numerology Examples
The ancient book Yuan Hai Zi Ping
Six hexagrams:
Qu Wei's "Detailed and True Six hexagrams"
Qu Wei's "Six Yao Multiple Images"
Qu Wei's Lecture Notes for Six Advanced Classes
Li Shunxiang's Six Mysteries
Six-year training courses in Li Shunxiang: elementary, intermediate and advanced.
Ancient books: poor slips and authentic divination.
Li Hongcheng, Lecture Notes on Six Specific Faults.
Feng shui:
Note: Feng Shui can be roughly divided into two schools, one is rational style and the other is formal style.
Shen Shi's metaphysics, a masterpiece of scientific style, goes up and down.
Shi Yang Fengshui
The Biography of Golden Lock and Jade in Regular School
Reference: Crossing Yin and Yang
Liu Bowen's geographical encyclopedia.