A man dances to a robot at the 13th China Hi-tech Fair held in Shenzhen, Guangdong province, on Nov 16, 2011. Participants from nearly 50 countries have come to CHTF to trade and display their products, including some 30 national or international organizations from USA, UK, Germany, and Canada, as well as over 40 multinationals such as Microsoft, IBM, Oracle, Siemens, Ericsson, Phillips, and Sony. The fair will end on Nov 21. [Photo / Xinhua]