Shanghai is China's most populous city and its most important center for commerce and art.
Located at the mouth of the Yangtze River, Shanghai was a relatively unimportant city until the mid of the 19th century when it was opened to foreign trade.
Since the early 1990s Shanghai has experienced an unprecedented building boom that completely transformed the city. Although there are no official numbers it is generally assumed that Shanghai has more highrise buildings than any other city in the world. It's ever-growing subway system also became the world's longest in early 2010.
In recent years the city has also made a name for itself by hosting a lot of huge events, most noteably the EXPO 2010.