[Textual research on the evolution of therapeutic indications of Fenglong (ST 40): discussion on the related articles for "Fenglong (ST 40) for phlegm" published in ].

Based on (), combined with the ( ) and unearthed (), it is recognized that the therapeutic indications of Fenglong (ST 40) were recorded repeatedly in many medical works of the Qin and Han dynasties; and the treatments mostly focus on "upward reversion of ". In (), a part of symptoms were re-described textually, which affects the understanding on the indications of Fenglong (ST 40) in the medical works of the later generations. On the basis of the construction of phlegm theory in the Sui and Tang dynasties, the scholars of Song, Jin and Yuan dynasties had placed the emphasis on the relationship between phlegm and movement. In acupuncture works by , Fenglong (ST 40) was selected in treatment of phlegm dampness and phlegm-induced asthma, which is also based on the pathogenesis, "upward reversion of ", rather than "phlegm" itself. This view can be understood by the proof of "reducing Zusanli (ST 36) for eliminating wind". The relationship between Fenglong (ST 40) and phlegm was emphasized in () and (), after which, the understanding, " Fenglong (ST 40), the key point for phlegm disorders", had been formed gradually since the Ming dynasty. The formation and evolution of the therapeutic indications of Fenglong (ST 40) are influenced comprehensively by the errors in textual duplication, cultural background, changes in the term expressions of disorders, and the clinical experience of medical practitioners.