Duyun Maojian is one of the top ten famous teas in China. In 1956, it was named by Mao Zedong himself, also known as "White Hair Tip", "Fine Hair Tip", "Fish Hook Tea", and "Sparrow Tongue Tea", and is one of the three famous teas in Guizhou. The appearance is tightly tied, slender and curly, with a long hair and a green color. The fragrance is high, the taste is fresh and strong, and the bottom of the leaves is tender green, even and bright. Produced in Duyun City, Guizhou Province, it belongs to Qiannan Buyi and Miao Autonomous Prefecture. It tastes good. It also has a variety of effects and functions, such as promoting fluid production and thirst quenching, clearing the heart and eyes, refreshing the brain, removing greasy food, inhibiting atherosclerosis, reducing fat and weight, preventing cancer, preventing scurvy and protecting radioactive elements