China's three major marine economic zones include those cities! To be specific, introduce their characteristics.

Shandong Peninsula Blue Economic Zone: This zone starts from Hutou Cliff in Yantai City in the west and ends at Xiuzhen Estuary at the junction of Su Ru in the south, which is a bedrock coast with a coastline of 3,000 kilometers and a tidal flat area of about 2,400 square kilometers. The advantages of marine resources are fishery resources, tourism resources and port resources. The marine development foundation is good and the marine economy is relatively developed. The main development directions are: developing mariculture and offshore fishing, and doing a good job in deep processing of aquatic products; Strengthen the status of Qingdao container trunk port and improve the comprehensive development level of Yantai, Rizhao and other ports; Taking marine comprehensive science and technology as the guide, vigorously develop marine bioengineering, marine drug development and marine fine chemical products; Development and construction of coastal and island tourist belts with emphasis on Qingdao, Yantai and Weihai; Actively develop seawater utilization in water-deficient cities such as Qingdao. ?

Zhejiang Marine Economic Development Demonstration Zone: The whole sea area of Zhejiang, the urban areas of Hangzhou, Ningbo, Wenzhou, Jiaxing, Shaoxing, Zhoushan and Taizhou, and the coastal counties (cities) under the jurisdiction of seven cities (including Zhoushan Islands, Taizhou Islands and Dongtou Islands), the land area of the demonstration zone is * * * 35,000 square kilometers, including 2,000 square kilometers of islands, accounting for all of Zhejiang. Zhejiang will build a marine economic platform with a spatial layout of "one core, two wings, three circles, nine districts and many islands", with Ningbo-Zhoushan Port sea area, islands and their supporting cities as the core areas; In terms of industrial layout, the industrial belt around Hangzhou Bay is the north wing, which has become an important platform to lead the development of marine economy in the Yangtze River Delta, while the coastal industrial belts in Wenzhou and Taizhou are the south wing, which is in the same strain as the Haixi Economic Zone in Fujian. Hangzhou, Ningbo and Wenzhou, the three coastal metropolitan areas, serve the industrial upgrading by improving the service function and scientific and technological support function of modern cities. On this basis, nine coastal industrial clusters will be formed to promote the development and protection of Zhoushan, Wenzhou and Taizhou.

Guangdong experimental zone for comprehensive development of marine economy has not been approved.

The goal of Guangdong's comprehensive marine development is to promote and optimize the core role of the Pearl River Delta Marine Economic Zone, and to develop and strengthen the two growth poles of the Guangdong Marine Economic Zone and the Western Guangdong Marine Economic Zone. With the Pearl River Delta Marine Economic Zone as the support, strengthen the cooperation with Hong Kong and Macao marine industry, and build a marine economic cooperation circle between Guangdong, Hong Kong and Macao; Supported by the East Guangdong Marine Economic Zone, it will connect with the economic zone on the west side of the Taiwan Strait to build a Guangdong-Fujian marine economic cooperation circle; Supported by the Western Guangdong Marine Economic Zone, the Beibu Gulf Economic Zone and Hainan International Tourism Island will be docked to build a marine economic cooperation circle between Guangdong, Guangxi and Qionghai.