[Textual research on Dan Fang Jing Yuan (Mirror origin from alchemical chambre), an alchemical herbology].

Having made a textual research on the relation between the two editions of Dan Fang Jing Yuan of Zheng Tong Dao Zang and Zheng Lei Ben Cao, we consider the materials quoted by the latter to be derived from the three-volume Dan Fang Jian Yuan of Dao Zang, while the Dan Fang Jing Yuan from the fourth volume of Qian Gong Jia Geng Zhi Bao Ji Cheng is in fact an apocrypha of Zheng Lei Ben Cao by Song people. The dating of the two books are also studied.