网页2024年4月22日 · Haimen, previously a county-level city, became a district of Nantong in 2020. It is the first county-level city north of the Yangtze River in Jiangsu to meet comprehensive socioeconomic well-being standards, with a GDP exceeding 100 billion yuan ($13.81 billion), and has been awarded the title of "Advanced County (City, District) in …