Strictly speaking, Tieguanyin is fixed green tea.  According to the "Dictionary of Chinese tea culture" to: "① fixed green tea, also known as oolong tea, one of the six tea, tea green leaves and red edge products, scented fragrance special. Products by geographical region and the characteristics of a system of Wuyi Yancha , North Fujian fixed green tea, Taiwanese fixed green tea, Guangdong fixed green tea, Taiwan fixed green tea. ② oolong tea category, including Fujian, Guangdong, Taiwan produced by Said. northern Fujian Oolong, Anxi Oolong, which is in Guangdong Oolong tea tree varieties leaf processing product name. ③ fixed green tea-producing areas in southern Fujian Anxi as the center, including Yongchun, Zhangping and other places, Tieguanyin, color species, Narcissus, bergamot, such as Oolong. ④ Oolong produced in Anxi in Anxi, Fujian to create the fresh leaves of Oolong tea. "  According to the "China tea," to: "China can be divided into the basic tea and tea reprocessing tea. Basic tea including green tea, black tea, oolong tea (fixed green tea), white tea, yellow tea, six Both black tea. Rail Guanyin used varieties of tea, oolong tea because it suitable system, also known as oolong tea products Tieguanyin. "  According to the "China-tea" to: "Anxitieguanyin history tea, oolong tea is like."  "Tea-" China will be divided into green tea, yellow tea Both black, white tea, fixed green tea, black tea six, which included the Tieguanyin fixed green tea category.  This launch, Tieguanyin is "fixed green tea", but also a "tea", but included in fixed green tea more appropriate.