Chinese subway flat screen advertising network operator DMG (Digital Media Group) announced that the company will launch a flat panel advertising network in Beijing's Metro Line 4. Beijing's Line 4 is expected to be completed in 2009. The Line 4 system will be DMG's first deployment of its flat screen network in Beijing. DMG said that Beijing's existing subway lines are too old to support its flat panel network. DMG's network along Line 4, which will include screens in subway cars, platform and ticketing halls, will have 2,000 screens. DMG also operates networks in Shanghai, Hong Kong, Chongqing, Tianjin, Shenzhen and Nanjing.