Located in Laobanzhang Village, Brown Mountain Township, Menghai County, Xishuangbanna Prefecture, Yunnan Province, the whole village has 1 17 households, and they are descendants of the Brown people (Gupu people). Bulang people are the earliest people who planted, produced and drank tea in the world. The elevation of Laobanzhang Village is between1.700m and1.900m, with undulating mountains and criss-crossing valleys. It belongs to subtropical monsoon climate, with abundant sunshine and rainfall. The average annual temperature is 18.7℃, the average annual sunshine is 2088 hours, and the average annual rainfall is 1 ~ 65438. Tiancheng has the climatic characteristics of "no severe cold in winter, no coolness in summer, four seasons like spring" and "foggy in winter and spring", with an average annual foggy day 107.5 ~ 160.2 days. Qiaomu tea covers an area of 4,700 mu, with an annual output of only 50 tons of green tea. The original ecological vegetation diversity culture is well preserved, with rich soil organic matter, abundant sunshine, dense clouds and high humidity, which is especially suitable for the growth of ancient tea trees. For a long time, villagers in Laobanzhang have followed the traditional ancient method, artificially maintained ancient tea trees, picked fresh leaves by hand, dried green tea, and suppressed all kinds of pressed tea by stone grinding. Today, the boss Zhangzhai ancient tea is a rare place in Yunnan Province that does not use inorganic substances such as fertilizers and pesticides. It is pure natural, pollution-free and original.