Figure 6

(a) Dahongpao tea growing area divisional map. Zhengyan (A1, A2, A3), Banyan (B1, B2, B3) and Zhouyan (C1, C2, C3) tea are distributed like the circle picture. (b) Diagrammatic presentation of tea brewing method. 5 g of each tea sample was boiled in 100 °C pure water for 14 times.