Introduction to Shuangjiang: Shuangjiang is named after the junction of Minjiang River and Xiaohei River in the southeast of the county. It belongs to Linyi City, Yunnan Province, with a total area of ​​2,615.03 square kilometers. It consists of 3 communities in 72 villages of 4 townships, 2 towns, and the Overseas Chinese Management District of Suiku and Shuangjiang Farm Management Committee. As of 2013, 170,000 people. In 2012, Shuangjiang County completed a total production value of 2.3 billion yuan. Shuangjiang is the hometown of China's multi-ethnic culture. It is the only multi-ethnic autonomous county in China that is composed of four main ethnic groups: Lahu, Yi, Blang and Yi. Shuangjiang is the native place of the Chinese oyster leaf big leaf tea. It was born in Shuangjiang's 勐 大 big leaf tea. It was twice rated as a traditional Chinese tea tree in the 60s and 80s by the National Tea Tree Variety Committee. Shuangjiang is the green pearl on the Tropic of Cancer. The Tropic of Cancer crosses Shuangjiang County, and the climate is typical of the southern subtropical warm and humid monsoon climate.