A boy tries out a robot during the High-Tech Expo at China International Exhibition Center, Beijing, May 23, 2012. The 15th China Beijing International High-Tech Expo kicked off on Wednesday. This year's expo mainly focuses on the latest development in IT, new energy as well as energy-saving and environmental protection industries.[Photo/Xinhua]

Visitors take picture of a robot during the High-Tech Expo at China International Exhibition Center, Beijing, May 23, 2012. [Photo/Xinhua]