people around the world hailed the opening of the 2010 WorldExpo on the evening of April 30, a proud curtain-raising ceremonyfeaturing a hi-tech display of dazzling artistic performances, laserlights and fireworks. Around 8,000 spectators watched the two-hour opening ceremony on the Expo site live, including ChinesePres dent Hu Jintao and 20 foregn leaders.

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