Essence of medical records of famous doctors in Qing Dynasty Essence of medical records of Zhao Haixian

Yi Haixianren’s “Bazi Introduction and Improvement” page 143

Four Pillars of Destiny Gua (edited by Ni Haixia and Yi You)

Ni Haixia Tianji “The Way of Earth”

Ni Haixia Tianji “The Way of the World”

Ni Haixia Tianji “Tianji Dao”