Liu Haijie (1st L), a student from the University of Science and Technology Beijing, introduces application programs of Window 8 software at a media preview in Shanghai, east China, Oct. 23, 2012. Microsoft officially started a series of global celebrations for the launch of its Windows 8 system on Tuesday in Shanghai, making the Chinese economic center the world's first showcase for the IT giant's new software product. Microsoft will launch Windows 8 and the Surface tablet computer in China on Friday. [Xinhua]