The Yuanshi Wuliang Duren Shangpin Miaojing Tongyi 元始无量度人上品妙经通义

Yuanshi Wuliang Duren Shangpin Miaojing Tongyi (Comprehensive Meaning of the Supreme Wonderful Scripture of the Primordial Beginning for Delivering Beings Without Limit) Annotated by Zhang Yuchu, the 43rd Heavenly Master of Taoism in the early Ming Dynasty.

Consisting of four volumes, it is included in the Yujue (Jade Commentaries) category of the Dongzhen (True Grotto) Section in the Daozang (Taoist Canon).

At the beginning of the book, there are six diagrams, including Taiji Miaohua Shenling Hundong Chiwen Zhi Tu (Diagram of the Mysterious Transformation of the Taiji, Spiritual Beings, and the Mixed Grotto Red Script) and Hetu Xiangshu Zhi Tu (Diagram of the River Map and Its Numerical Principles). These diagrams elaborate on the core principles of the commentary through the Yijing (I Ching) scholarship and diagrammatic theory of internal alchemists.

The annotations synthesize theories from various scholars, such as Xue Youqi, Li Shaowei, Zhenren Qingyuan, Xiao Yingsou, and Mr. Mo’an, with a focus on interpreting the scripture through internal alchemy (neidan) theory. Often, lengthy sections are dedicated to expounding on internal alchemical principles, and terminological explanations also adopt internal alchemical terminology.

At the end of the book, three additional diagrams, a diagram explanation, and a text purportedly dictated by the Azure Heaven Emperor (Qingtian Dijun) are appended.