A woman experiences cellphone blocking software at China International Software Convergence & Innovation Expo 2012 in Qingdao, a coastal city of east China's Shandong province, Aug 10, 2012. The three-day expo, which kicked off on Friday, attracted more than 170 famous software and information technology companies from at home and abroad. (Xinhua/Li Ziheng)

A man experiences cloud system software at China International Software Convergence & Innovation Expo 2012 in Qingdao, a coastal city of east China's Shandong province, Aug 10, 2012. The three-day expo, which kicked off on Friday, attracted more than 170 famous software and information technology companies from at home and abroad. (Xinhua/Li Ziheng)