Dayu County lies in the southwest part of Ganzhou, Jiangxi Province, China . It covers a total area of 1367.63 square kilometers, governing 17 townships, and total population is 280,000.The county executive, legislature,  judiciary are at Nanan Town ,together with the CPC and PSB branches.

Dayu County the formation of tungsten deposits in the well-known all over the world, are world-renowned "World of tungsten are." Mineralization in the territory of an area of about 30 square kilometers, the size of veins have more than 3000.