Fig. 2

The portrait of Shen Nung in a fashionable manner as a “wild man” by Guo Xu [6]. Shen Nung is a legendary emperor credited with inventing medicine and discovering tea. The legend says when Shen Nung was boiling water, a few leaves from a wild tree fell into the bowl. Because tea tasted refreshing and cleared his mind, it was first documented as a herbal medicine beverage. The story also suggests that tea has a simple form, the green tea, in the first place