A visitor walks past China's exhibition area at the Hannover Industrial Expo in Hannover, Germany, on April 8, 2013. More than 730 Chinese companies participated in the world's largest and most influential industrial technology fair which kicked off on Monday. (Xinhua/Ma Ning)

People visit China's exhibition area at the Hannover Industrial Expo in Hannover, Germany, on April 8, 2013. More than 730 Chinese companies participated in the world's largest and most influential industrial technology fair which kicked off on Monday. (Xinhua/Ma Ning)

People visit China's exhibition area at the Hannover Industrial Expo in Hannover, Germany, on April 8, 2013. More than 730 Chinese companies participated in the world's largest and most influential industrial technology fair which kicked off on Monday. (Xinhua/Ma Ning)