Dongtai City, a county-level city under the jurisdiction of Jiangsu Province, is managed by Yancheng City. Dongtai City is located in the middle of the coast of Jiangsu Province, the north wing of the Yangtze River Delta, between 120 ° 07 ′ - 120 ° 53 ′ E and 32 ° 33 ′ - 32 ° 57 ′ N, with a total area of 3175.67 square kilometers. Dongtai has a subtropical monsoon marine climate. As of 2019, Dongtai City has jurisdiction over 14 towns and 6 township units. The municipal government is located in Dongtai Town. According to the data of the seventh population census, as of 0:00 on November 1, 2020, the permanent resident population of Dongtai City is 888410.

Dongtai was formerly known as Yan, also known as Xixi, Dongting, etc. In 1987, the State Council approved the withdrawal of Dongtai from the county to build a city (county level). There are two railway stations in Dongtai City, Dongtai Station (passenger and freight) and Fu'an Station (freight). Dongtai City has been famous for its salt production since ancient times. Most of the Dongtai people belong to Jiangsu and Zhejiang people. Dongtai is a national garden city and an excellent tourist city in China. Since 2019, it has been rated as one of the top 100 counties and cities with comprehensive strength in 2019 and one of the top 100 counties and cities with green development in 2019. Dongtai has a long history. There are such scenic spots as the Huguo Temple, the Mituo Temple, the Huanghai Forest Park, and the Dongyong Seven Fairies Cultural Park. Among them, the legend of Dong Yong is listed as the national intangible cultural heritage.

In 2020, Dongtai will achieve a gross regional product of 89 billion yuan, up 5.5%; The added value of industries above designated size increased by 8.5%; The general public budget revenue was 5.46 billion yuan, and the investment in fixed assets was 48 billion yuan, up 9%; The total import and export volume of foreign trade was 1.23 billion US dollars, up 19.5%; The registered foreign capital actually received US $111 million, up 11.2%; The R&D investment of the whole society accounts for 2.5% of GDP.