Located in the mid-west of Zhoushan Island, Dinghai District, with a population of about 370, 000 people, covers an area of 1,444 square kilometers. It has 128 islands and a coastline of 428 kilometers long. It is close to Putuo Island, a state-level scenic spot, and Zhujiajian, a state-level ecological island. The district is regarded as an important place linking Yangtze River Delta and the outside world. Endowed with natural deep-water ports, Dinghai serves as a key position for China's water transport., and is an important part of Shanghai International Shipping Center as well as of Ningbo–Zhoushan Port.
As a garden island suitable for residence, Dinghai takes pride in its ecological environment, where the fresh air can match that in Sanya city of Hainan Province. Thanks to numerous sea bays, there are also abundant aqua resources in the sea around it. In recent years, Dinghai has been given the titles of Historic and Cultural District in Zhejiang Province, National Ecological Demonstration Area, and provincial Model District. It has also got the title of National Double-support Model City six times, and the title of Safety District given by the provincial government five times.
The name Dinghai originated from a tablet with the words 'Dinghai Hill' written and bestowed by Emperor Kangxi in 1687. With a history of over 1,200 years, Dinghai has been listed among the first Historic and Cultural Districts in Zhejiang Province.
Dinghai was one of the major battle sites resisting British invasion in Opium War. The history has witnessed many talents on this land, including Zhu Baosan, Liu Hongsheng ,Zhou Xiangsheng, Wang Qiyu, who were famous domestic entrepreneurs in the beginning of the 20th century, and including many scholars, politicians and public figures such as Qiao Shi, Ding Guangxun, An Zijie, and San Mao. it is the home of the world-known ‘Ningbo Bang', general designation for businessmen born in Ningbo.
In recent years, focusing on the goal of building a powerful marine economy and standing on a new starting line in bridge era, Dinghai are unswervingly promoting its development pattern, as well as the transformation and upgrading of economy. As result, four pillar industries have come into being, which include marine chemicals, ship building, plastic machinery and processing of aquatic products.
Dinghai is called ‘China's Capital of Screw', sharing 70% of screw market in China. Now it is accelerating its development pattern of clustering production elements and industries, as its port economy is standing out among others and its industry platform is being continuously improved.