| Summary: | 博士 === 中國醫藥大學 === 中醫學系博士班 === 106 === It has been a long time that the guei has been documented; however, the concept and objective of guei still differed through history. There are many derived names such as jiun-guei, mu-guei, guei-zhi, rou-guei, and guei-xin that confused the efficacy from bencao to bencao. The purpose of this research is to clearly identify the meaning of jiun-guei, mu-guei, guei-zhi, rou-guei, and guei-xin, by searching through many editions of bencao in the history and the writings of Chinese medical doctors. From the research result it shows that jiun-guei is thin roll to triple roll. The origin of mu-guei was non-rolling type. Guei-zhi, rou-guei, and guei-xin were derived from the branchlets of mu-guei and have been called guei since the northern and southern dynasties. Guei-xin is guei-zhi and rou-guei without the bark. Jiun-guei without the bark was also used as guei-xin since the song dynasty. Rou-guei is half-rolling, more fats, and thick skin. Guei-zhi is half-rolling, more fats, and tender twig skin. Liu-guei is the twig of the medicinal and replaces guei-zhi since the song dynasty. Therefore, guei-zhi and rou-guei are both skins with half-rolling, more fats. Guei-zhi is not the twig as the pharmacopoeia specified. To ascertain the concept and objective of jiun-guei, mu-guei, guei-zhi, rou-guei, and guei-xin from bencao to bencao can ensure the safety and efficacy.
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