我国三大海洋经济圈持续扩能，沪深青等城市海洋国际竞争力提升

Core Insights - The "China Marine Economy Development Report 2025" indicates that the national marine GDP reached 10.5 trillion yuan in 2024, reflecting continuous expansion of the marine economy and significant advancements in marine technology innovation and resource utilization [2] Group 1: Marine Economic Zones - The northern, eastern, and southern marine economic zones have shown sustained growth, with marine GDPs of 31,899 billion yuan, 33,446 billion yuan, and 37,858 billion yuan respectively, representing nominal growth rates of 33.1%, 37.7%, and 33.3% compared to 2020 [2] Group 2: Marine Strong Provinces and Modern Marine Cities - Shandong has enhanced its marine technology capabilities, utilizing the world's fastest supercomputer "Shenwei Marine Light" [3] - Zhejiang's port integration reforms have led to significant growth, with Ningbo-Zhoushan Port achieving its highest container throughput growth in seven years [3] - Guangdong is developing billion-level industrial clusters in marine engineering and offshore wind power, with the successful operation of the world's first megawatt-level seawater electrolysis hydrogen production facility [3] Group 3: Marine Economic Development Demonstration Zones - Sixteen marine economic development demonstration zones have made notable progress in promoting high-quality marine economic development based on their unique advantages [4] - Tianjin has established the first domestically produced seawater desalination production line, while Weihai's national distant-water fishery base has achieved a 90% return rate for self-caught seafood [4] - Qingdao has released a billion-level model "Hanhai Xingyun," and Lianyungang has operated 911 China-Europe freight trains, marking a 13% increase [4]