Li Ziyang-Qintian Wuji Gate Da Yi Yuan Zhengzong-Zi Wei Dou Shu Secret Instrument Transmission (261 pages).pdf

The ancient book of geography, geomantic omen and feng shui “Liqi Zhengzong” written by Yin Guangzhong and his husband (Qing Dynasty)

Liu Jincai Zhengzong Ziping’s doctoral dissertation