1. The efficacy and functions of cassia twig. The functions of cinnamon twig can be roughly divided into harmonizing energy, promoting yang, diuresis, removing blood stasis, tonic, dispersing cold, etc.

2. The origin of Guizhi. Guizhi is cultivated in tropical and subtropical areas of Fujian, Taiwan, Hainan, Guangdong, Guangxi, Yunnan and other places, especially in Guangxi, and most of them are artificial pure forests.