Chinanews, Shanghai, April 27 - Shanghai World Expo 2010 will be the first comprehensive international expo hosted in a developing country. It is estimated that more than 70 million people will attend the expo.The organizing committee of Shanghai World Expo started soliciting the design of the Hall of the State and the Hall of Regions of the Halls of China, one of the most important exhibition building of the World Expo, from Chinese worldwide.The design of the Halls must be completely compatible with both traditional Chinese culture and the modern idea of building a harmonious society, and should be able to serve as a model for other Chinese urban planners.The Halls of China will be built at the central zone of the exhibition area, and consist of the Hall of the State, the Hall of Regions, and the Hall of Hong Kong, Macao and Taiwan. The Hall of Hong Kong, Macao and Taiwan will be a mobile structure built by architects from Hong Kong, Macao and Taiwan, while the first two halls will be permanent structures in Shanghai.The solicitation will come to an end on May 31, and the result will be published on June 30.