Visitors watch robots dancing at the RoboCup2008 in the Suzhou International Exhibition Center in Suzhou, East China's Jiangsu Province, July 16, 2008. Some 300 teams of scientists from 30 nations will compete in the five-day event, the soccer world cup for robots, also known as the world's most renowned intelligent robotics competition. [cnsphoto]   Visitors watch robots dancing at the RoboCup2008 in the Suzhou International Exhibition Center in Suzhou, East China's Jiangsu Province, July 16, 2008. Some 300 teams of scientists from 30 nations will compete in the five-day event, the soccer world cup for robots, also known as the world's most renowned intelligent robotics competition. [cnsphoto]