The image below above shows how the economy of Chongqing, China grew by 4x. Between 2007 and 2012, it was the fastest growing city in China at around 15%/annum.
Much of this growth is credited to the controversial politician Bo Xilai who rebuilt infrastructure, attracted foreign investment and encouraged urbanization. Chongqing had a total population of about 29 million in 2010, according to the China National Bureau of Statistics.
See more cities exploding in beautiful gif format here at Business Insider