Wulong.

Wulong District runs along the lower Wu River in south-eastern Chongqing, with Guizhou at its southern border, and covers 2,901.3 square kilometres. It was a county until November 2016, when it became a district. Its economy now rests on tourism and modern agriculture rather than extraction: the district government gave up developing the bauxite along the Wu River in order to protect the river's environment and ecology. The limestone inside its borders is protected as part of the UNESCO South China Karst World Heritage Site, and the district has become one of the fastest-growing in south-eastern Chongqing. National Highway 319, cut into the cliff face in places, is still the old road through it.