Ürümqi is the capital of Xinjiang Uyghur Autonomous Region of the People's Republic of China, in the northwest of the country. With a built up population of 3,110,280 (5 urban districts plus Midong) and 2.3 in urban districts, Ürümqi, whose name means "beautiful pasture" in the Mongolian language of the Dzungar people, is the largest city in China's western interior. According to Chinese scholars, during the 22nd year of Emperor Taizong's reign in the Tang Dynasty, AD 648, the Tang government set up the town of Luntai in the ancient town seat of Urabo, 10 kilometers from the southern suburb of present-day Ürümqi. Ancient Luntai Town was a seat of local government, and collected taxes from the caravans along the northern route of the Silk Road.