Changsha is the capital of Hunan, China. It is the 17th most populous city in China with a population of over 10 million, and the third-most populous city in Central China, located in the lower reaches of the Xiang River in northeastern Hunan. The city forms a part of the Greater Changsha Metropolitan Region along with Zhuzhou and Xiangtan, also known as Changzhutan City Cluster. Greater Changsha was named one of the 13 emerging mega-cities in China in 2012 by the Economist Intelligence Unit.