The county was established in 1396, the second year of the Ming dynasty's Hongwu Emperor. With the completion of the Yangtze and Chongqi Bridges, it is now connected to both the rest of Shanghai and southeastern Jiangsu province along the Hushan Expressway. Further development is now proceeding according to an urban and agricultural master-plan led by Philip Enquist of SOM, although ambitious plans for an ecocity named Dongtan have been shelved since the 2006 ouster of mayor Chen Liangyu and other neighborhoods have swelled with immigration from people relocated from central China following the completion of the Three Gorges Dam.