Yancheng, called Du Yan in ancient times, is also called Piaocheng, Deng Ying and Baihe. It is a prefecture-level city under the jurisdiction of Jiangsu Province and a central city in the Yangtze River Delta. It is located in the east coast of China, the east of Jiangsu Province, the Yellow Sea in the east, Nantong in the south, Yangzhou and Taizhou in the southwest, Huai 'an in the northwest and Lianyungang in the north. The whole city is a plain landform, which is the transition from north subtropical zone to warm temperate zone.

Yancheng was built as Du Yan County in the sixth year of Emperor Gaudi in the Western Han Dynasty (20 1 year ago), and was renamed as Yancheng County in the ninth year of Jin 'an Yixi in the Eastern Jin Dynasty (4 13 years ago). Yancheng has the only world natural heritage in Jiangsu-the migratory bird habitat in the Yellow Sea (Bohai Sea) of China, and the urban land, sea and air transportation is convenient, basically forming a five-in-one three-dimensional transportation network of expressway, railway, aviation, shipping and inland river shipping.

topography

Yancheng is a plain landform, which is high in the northwest and southeast and low in the middle and northeast. Most areas are less than 5 meters above sea level, and the maximum relative height is less than 8 meters. It is divided into three plain areas: Huanghuai Plain, He Lixia Plain and Binhai Plain. Huang-Huai Plain is located in the north of the main irrigation canal in northern Jiangsu Province, and its terrain is roughly centered on the abandoned Yellow River, and gradually descends to the northeast and southeast. The highest elevation of the abandoned Yellow River is 8.5 meters, and the lowest elevation along the southeast Sheyang River is only about 1 meter.

He Lixia Plain is located in the south of the main irrigation canal in northern Jiangsu and west of Chuanchang River. It is a part of He Lixia Plain with a total area of over 4,000 square kilometers. The plain is high around and low in the middle, with the lowest elevation of only 0.7 meters. The coastal plain area is located in the south of the main irrigation canal and east of Chuanchang River, with a total area of more than 7,000 square kilometers, accounting for about half of the city's total area. The plain area gradually inclines from southeast to northwest.

Reference to the above content: Baidu Encyclopedia-Yancheng