Lushan National Ocean Park, located in the sea about four nautical miles northeast of the sea exit of Dongzao Port, Haimen City, Jiangsu Province, is also known as Lu Island, an area of about 3.5 square kilometers. It is a biological reef formed by the accumulation of living oysters in the sea. It enters the water as a reef and the outlet is an island. Lushan is famous for its rich oysters, and there are sand ginseng and Guangong crab on the island, which are wonderful and delicious. In order to protect Lushan's natural resources, in 2006, the National Oceanic Administration established a special marine reserve here, and Lushan became the first national marine special reserve in Jiangsu Province. After field inspection and demonstration of relevant units such as Nanjing Geography Institute of the Chinese Academy of Sciences, it is believed that Lushan is the only rare marine wonder in China and the world, and has extremely high scientific investigation and tourism development value.