As a sponsor that has supported Earth Hour for four years, JCDecaux China, together with its partners in a number of Chinese cities, once again promoted the campaign by combining its advertising network covering 30 metro light boxes in Shanghai, Nanjing, Chongqing and Tianjin and 37 buses in Shanghai, Tianjin and Chongqing with its 100 dynamic multimedia displays across Beijing's universities, laying a sound foundation for the continued success of this year's campaign.