World expos have a 159-year history. The first expo was held in London in 1851 to show off the fruits of the first Industrial Revolution. Twenty-eight countries around the world received the invitation from Queen Victoria. The early expos were largely mass-market general fairs and there was nothing regular about their scheduling. That changed in 1933 when Chicago held a world's fair named the "Century of Progress Exhibition" that documented technological inventions and innovations. Ever since, the World Expo has been held every five years and each hosting nation has picked a clear theme. World expos thus evolved from "non-sales product fairs" or "achievement exhibitions" to "thematic expos" with exhibits revolving around one main theme.
Shanghai won the bid to host the Expo in 2002. After almost a decade of hard work to upgrade its infrastructure, Shanghai unveiled its grand international show -- the World Expo 2010 -- on the evening of April 30, 2010. Here are some facts about the expo 2010:
Official website of Expo 2010 Shanghai China at http://en.expo2010.cn/
Taiwan panorama June 2010.