The origin of this nickname is "Duck feces incense": Big black leaf dancong tea was originally introduced from Wudong Mountain and planted in the tea garden of "Duck feces soil" (actually yellow soil), with a dark blue The tea leaves have grown like leaves of Gangmu (scientific name Premna puberula). After drinking this kind of tea, the people in the village said that the tea had a good aroma and a strong flavor, and asked one after another what kind of name and type. The tea farmer was afraid of being stolen, so he lied that it was duck feces incense.