Ürümqi is the capital and largest city of the Xinjiang Uyghur Autonomous Region in Northwestern China. With a census population of 4,054,000 in 2020, Ürümqi is the second-largest city in China's northwestern interior after Xi'an. Ürümqi has seen significant economic development since the 1990s and currently serves as a regional transport hub and a cultural, political, and commercial center.