The Theoretical Basis of Yang Gong's Feng Shui
The essence of Yang Gong's geomantic theory is all taught by the teacher, and other theoretical bases are nine books, namely, Yi Long Jing, Han Long Jing, Hua Jia Tu, Four Divisions, Li Zu Fu, Sha Tu, Fetal Abdominal Jing, Wang Long Jing and the Method of Inverted Staff. Shu Shu Shu Shu Series (IX) records five books written by Yang Gong: Yilong Jing, Hanlong Jing, Burying with an Inverted Staff, Qingnangao Yu and Tian Yu Jing. These ancient books are regarded as the theoretical basis of Yang Gong's geomantic omen.