The Shanghai 2010 World Expo runs from May 1 to October 31, 2010, in Shanghai; it is the first Expo hosted by China. With an estimated 70 million visitors, it is the largest Expo (or World’s Fair) in history. A total of 242 participants will display at various pavilions at the Expo: 192 countries and 50 international organizations.
The Expo Grounds are in central Shanghai on both sides of the Huangpu River, mostly between the landmark Nanpu and Lupu bridges. The Expo grounds are vast: more than 5.28 square kilometers including 3.93 square kilometers on the eastern bank (Pudong) and 1.35 square kilometers on the western bank (Puxi). Source: US State Department