Xining is the capital of Qinghai Province, China, and the largest city on the Tibetan Plateau. It has 2,208,708 inhabitants at the 2010 census whom 1,198,304 live in the built up area made of 4 urban districts. Under the Han dynasty (206 BC-220 AD) a county there called Linqiang controlled the local Qiang tribesmen. It was again a frontier county under the Sui (581-618) and Tang (618-907) dynasties; during the 7th and early 8th centuries it was a center of constant warfare with the Tuyuhun and (later) the Tibetan peoples. In 763, it was overrun by the Tibetans and while under Tibetan control was known to the Chinese as Qingtangcheng.