The Ecotopia 2121 project details the future of 100 cities around the world as if they had somehow overcome all social and environmental problems to become superecological. This week we highlight the future of Gongshan, China. GONGSHAN 2121 The Salween River Valley in China is a landscape of rare beauty, often called the Grand Canyon of the East. It is the last great free-flowing river in China; all the rest have been dammed, diverted, or disappeared in the drought. The Salwe