1. Qimen black tea is a completely fermented black tea with mild properties. It is located in Qimen County, dongzhi county, Chizhou City, shitai county, Fuliang County and Qi Hong. The natural conditions here are superior, there are many mountains and trees, the soil is warm and humid, the rainfall is abundant, and there are many clouds, which is very suitable for the growth of tea trees.

2. Introduction of Qimenhong producing area: Qi Hong producing area has superior natural conditions, many mountain trees, warm and humid soil layer, abundant rainfall and plenty of clouds, which is very suitable for the growth of tea trees. In addition, Castanopsis eyrei, the main local tea variety, is rich in content and high in enzyme activity, which is very suitable for making Kung Fu black tea.

3. Qi black tea area is located in subtropical monsoon climate zone, with warm and humid, abundant rainfall and distinct four seasons.

4. Spring and summer are full of fog, "there is fog everywhere in the morning and evening on sunny days, and there are mountains and clouds all day on rainy days", and "the mountains are the body and the mountains are covered with clouds". Because of the high mountains and dense forests, many microclimate areas are formed, with superior natural environment and excellent tea quality.

5. Conclusion: In Qimen producing area, Xi Gu, Li Shan and Likou Pingli tea in Qimen County of Huangshan City have the best natural quality.