Dongtan was a planned development described as an eco-city on the island of Chongming in Shanghai, China that was never built. Design began in 2005, and by 2010 the development had stalled. Adjacent to booming Shanghai, designers claimed Dongtan would be the world's first truly sustainable new urban development. Dongtan was presented at the United Nations World Urban Forum by China as an example of a purpose-built eco-city, Reasons for the project's closure include its proposed location in a highly-valued wetlands area, tensions between its development partners (Arup, a British engineering company, and Shanghai Industrial Investment, a state-owned developer), and loss of political support (due to the jailing of Dongtan's top political backer, former Shanghai Communist Party chief Chen Liangyu, on corruption charges in 2008). The project has been described as a failure because it was not built. However, as an example of design it has inspired and informed other cities worldwide. Ideas from Dongtan were incorporated into the renovation of the Chongming District as a net zero island. Dongtan became a model for a subsequently planned eco-city outside Tianjin. Proposed Design Dongtan was to be located at the east end of Chongming Island, adjacent to the sensitive wetlands of the Chongming Dongtan National Nature Reserve, near the mouth of the Yangtze River and just north of Shanghai. Dongtan's first phase, a marina village of 20,000 inhabitants, was supposed to be unveiled at the 2010 World Expo in Shanghai. Some questioned the proposed city's potential effects on the surrounding wetlands. The director of the project, Peter Head, insisted it would not affect the wetlands. "First of all, water usually discharged into the river will be collected, treated, and recycled within the city boundaries," he said. "There will be a 2-mile buffer zone of eco-farm between city development and the wetlands." While farming is water intensive, relatively small amounts of water reach the plants themselves. Head said Dongtan "will capture and recycle water in the city and use recycled water to grow green vegetables hydroponically. This makes the whole water cycle much more efficient". The developers planned to create a fully built city, with 80,000 residents by 2020. London-based Arup and the Shanghai Industrial Investment Corporation (SIIC), the city's investment branch, originally partnered to create a master plan for Dongtan, an area three quarters the size of Manhattan. Their brief called for integrated sustainable urban planning and design to create a