Qi Men Gui Zong is a practical book. "Qi Men Gui Zong" was published by United Press in February 2012. "Qi Men Gui Zong" has nine volumes. This is an excellent book in the field of Yi studies with complete theories, complete methods, and concise and easy-to-learn methods. To understand Yi Xue and the academic thoughts of predecessors with an objective reading mentality, "Qi Men Guizong" is a better reading book. Kangxi rare book, published for the first time. "Qi Men Guizong" was written in the 58th year of Kangxi's reign, and was edited and annotated by Yang Fangsheng, a scholar during the Kangxi period.
Yi Xue is a philosophical knowledge that studies the laws of the operation of all things and their interrelationships under the guidance of the academic thought of correspondence between heaven and man. Yixue originated from the study of "Book of Changes", referred to as Yixue. It is the crystallization of the thoughts and wisdom of the ancients and is known as the source of the great road. The "Book of Changes" records many ancient historical events, so the "Book of Changes" is based on practice. The "Book of Changes" is the oldest, most systematic, and most profound classic of Chinese culture. It is the foundation of humanistic culture in China and even the world.