Dangui is a new breed that selected from nature half-bred offspring of Wuyi Rougui with systemic method by Tea Research Institute, Fujian province Academy of Agricultural Sciences. The breed has choiceness economy character, and have been planted more than ten thousand acres. At present, Dangui is mainly processed to oolong tea in production. In order to know more about the change of mainly biochemical compositions and the character in the four kinds of tea processing, and offer scientific gist to pr...