Shanghai

A city of eastern China at the mouth of the Chang Jiang (Yangtze River) southeast of Nanjing. The largest city in the country, Shanghai was opened to foreign trade by the Treaty of Nanking (1842) and quickly prospered. France, Great Britain, and the United States all held large concessions in the city until the early 20th century. Shanghai is located in Jiangsu province but is administered as a separate governmental unit. 
Population: 12,700,000.