Situated in the northern site of Nantong jurisdiction, Hai’an County borders three cities of two jurisdictions, Dongtai county under Yancheng jurisdiction and Jiangyan and Taixing of Taizhou jurisdiction. Accumulated evidences from archaeological finding in Hai’an have revealed early human settlers living on the land, tracking back more than 5,000 years. In history, Hai’an as an independent jurisdiction was changed or abandoned many times.

Hai’an county, in addition to a famous agricultural land in cocoon and livestock, is now famed for its textile production and silk manufacture, with a double-digit annual economic growth.

Under the jurisdiction of Nantong, Hai’an is mainly located in hinderland and has only a coastal of about 9 km. It borders three cities, Dongtai on the north, Jiangyan and Taixing on the west. The elevation of the county is low, 1.5 - 5 m in a range over sea level.

There are many rivers and canals running through the county, more than 500 in total. Tongyang Canal is an old canal, built in 179 – 141 B.C. in the Han Dynisty, and was renamed in 1909. It links to Yangtze river.

Jiangdu has a maritime monsoon climate, with distinct four seasons. The annual average temperature is around 15ºC with the hottest 39.7 in July 2003. The coldest weather is in January, 2ºC in average. The average precipitation is little bit more than 1,000 mm.

The most important natural resource is water to provide a convenient waterway transportation and for agriculture. In 2008, a large oil field was discovered and its annual production can be expected to 500,000 tons per year.

Hai’an was considered as a traditional agricultural land in the past and its agricultural sector is still the priority for the county. It has been well known for its production related to cocoon and livestock. Specifically the cocoon production has topped the province for 24 years in a row and the nation for three years. In addition, other principal farm products include rice, oil seeds, wheat, vegetable, etc. In recent years, the county is speeding up to develop its organic food sector to produce aquatic products, vegetable and fruid.

As the number one for cocoon production in the province, Hai’an has developed its silk industry and its brands is honoured as the best products in China.

The county have kept 15-20% or over of industrial growth in eight years in a row.

The county is a giant to export its construction workers to civil construction market. Each year, this industrial sector creates tens of thousands of jobs to local farmers and makes more than 1 billions of dollars of profit for local economy.

In recent development, a few of industrial sectors have been added to the county’s economy, including natural resource, electronic, mechanic industries and civil construction. Jiangdu’s environment and ecosystem are protected, specifically for its water resources. The city is making its effort to maintain its ecological environment and forest.