Chongming County

Chongming County (simplified Chinese: 崇明县; traditional Chinese: 崇明縣; pinyin: Chóngmíng Xiàn; Wu: Dzonmin Jeu) is the only county under the jurisdiction of Shanghai, China. The county consists of three main islands: Chongming Island (simplified Chinese: 崇明岛; traditional Chinese: 崇明島; pinyin: Chóngmíng Dǎo); Changxing Island; and Hengsha Island. These are low-lying alluvial islands in the mouth of the Yangtze River. With an area of 1,041 square kilometres (402 sq mi), Chongming Island is listed as the third largest island in Greater China after Taiwan and Hainan. The island first emerged in 618 due to a change in the water level of the river.