Dai Mountain in Penglai Island

Daishan Island and Qushan Island were called Penglai Fairy Island in ancient times. The fairyland in ancient Han legends is a place where gods live. Daishan County is located in the middle of the Zhoushan Islands along the northern coast of Zhejiang, at the southern end of the Yangtze River and Qiantang River estuaries, and on the outer edge of Hangzhou Bay. It is backed by large and medium-sized cities in Shanghai, Hangzhou, and Ningbo, between 30.7'-30.38' north latitude and 121.31'-123.17' east longitude. . It connects to the high sea in the east; to the Huang Dayang in the southeast, connecting the waters of Putuo District, Zhoushan City; to the southwest to the Gray Turtle Ocean; to the south to Guanmen Waterway, intersecting with the waters of Dinghai District; to the west, it reaches Qibi Bamei Island in the Gray Turtle Ocean, which is connected with Pinghu City It borders the sea areas of Cixi City and Chuanhu Islands (belonging to Qushan Town) in the north, and is adjacent to the sea areas of Shengsi County. The islands in the county run southwest-northeast, with Daishan Island as the center, and the islands are distributed in an "X" shape. It is about 169.6 kilometers long from east to west and 57 kilometers wide from north to south. It is composed of 404 islands, including 16 inhabited islands (including 5 islands inhabited by township governments).

Daishan is a small land county and a large ocean county. The county has a total area of ??5,242 square kilometers, with a land area of ??326.5 square kilometers (including 57.4 square kilometers of intertidal tidal flats) and a sea area of ??4,916 square kilometers. Daishan Island has the largest area, with an area of ??119.3 square kilometers (including a tidal flat area of ??14.35 square kilometers), and is the second largest island in the Zhoushan Islands; followed by Dqu Island, with an area of ??73.6 square kilometers (including a tidal flat area of ??13.78 square kilometers). Qushan Island was called Penglai Mountain in ancient times.

Daishan County has a maritime monsoon climate at the southern edge of the northern subtropical zone, with long winter and summer, short spring and autumn, and a long frost-free period.

Penglai Island has a long history and beautiful scenery. In the Qing Dynasty, literati such as Liu Menglan and Chen Wenfen once roamed the island and sang and chanted, forming the Ten Scenes of Penglai: Pumen Dawn, Shibi Remaining Light, Nanpu Returning Sails, Stone Bridge Spring Swell, Yushan Mirage, and Cross Street Fish market, Qugang fishing lanterns, raging bamboo waves, white peaks covered with snow, and deer fences with beautiful sand. Today's Penglai Fairy Island broadly refers to the entire county of Daishan. Daishan County was called Penglai Township in ancient times, and Shengsi belonged to Penglai Township in ancient times. Penglai Xiandao in the narrow sense now refers to Daishan Mountain. There are ten scenic spots in Daishan Mountain, and there are also ten scenic spots in Qushan Mountain. The center of Daishan County is on Daishan Island, with Daishan as the center. And Qushan Island is a virgin land, an authentic fairy mountain.

The county governs 7 towns, 4 townships, 169 administrative villages, and 17 neighborhood committees. The total population is 220,000. Gaoting Town, where the county government is located. Daishan is located at the choke point where the mainland coastline and the "golden waterway" and "T" shape of the Yangtze River meet. It is the maritime gateway of the Yangtze River Delta open to the outside world. The channel of Yangshan Deepwater Port of Shanghai International Shipping Center passes through the county. The county has a vast sea area and abundant deep-water coastlines. It has the two best deep-water port resources and the richest wind resources in East China. The unique resources provide an ideal location for the development of port-side industries and new energy industries. Daishan has thus become an important shipbuilding and marine energy base in Zhejiang Province. Daishan is also one of the top ten key fishery counties in the country. There are four major fishing grounds in Daiquyang, Huangdayang, Huangzeyang and Huiliyang. It is rich in various types of fish, shrimps, crabs and shells, with an annual output of about 330,000 tons of aquatic products. Traditional fishing has given birth to a unique marine culture, which is naturally integrated with the magnificent mountains and seas, making Daishan a veritable leisure and vacation tourist destination.