China unveils offshore wind AI data center

China has begun operating an underwater data center off Shanghai that is designed to run on electricity from an offshore wind farm and use seawater as its cooling source, according to Chinese government and state-media reports. The project is in Shanghai's Lingang area and has been described by Chinese authorities as the first of its kind to combine direct offshore wind power with natural seawater cooling. A May 23 social-media post amplified the project as an offshore wind-powered underwater AI data center, but the underlying public reporting in China shows the facility has been under construction and rollout for months. The installation is part of a broader push to cut the power and cooling burden from AI and other compute-heavy data-center workloads. ### What exactly has China built off Shanghai? China's Ministry of Transport said on February 14 that a subsea data center in Shanghai Lingang had officially entered service. The ministry said the project was built by CCCC Third Harbor Engineering Co., or Zhongjiao Sanhangju, and combines "offshore wind direct connection" with "natural seawater cooling." The same notice said the project has total planned investment of 1.6 billion yuan and a total planned scale of 24 megawatts, to be built in two phases. (mot.gov.cn) State-linked and local reports have described the site as an underwater data center positioned near the Lingang offshore wind farm. English-language Shanghai government and China Daily reports published in June said the commercial project was launched on June 10 and framed it as the world's first commercial underwater data center powered by an offshore wind farm. (mot.gov.cn) ### How does the wind-and-seawater setup work? The Transport Ministry said the power model uses dedicated subsea cables to send electricity generated by offshore turbines directly to the underwater data module. The ministry said that direct connection is intended to raise energy efficiency and cut transmission losses. Chinese reports said the cooling side relies on seawater as a natural cold source rather than conventional land-based cooling systems. (english.shanghai.gov.cn) The ministry said the project integrates ocean cooling, wind power supply, modular construction and intelligent operations and maintenance. Chinanews reported on May 15 that the machine room contains 192 racks, each with power of about 12 kilowatts, and said thousands of servers are intended to support internet and AI-computing demand. (mot.gov.cn) ### What numbers stand out in the first phase? The Ministry of Transport said the first demonstration phase is sized at 2.3 megawatts. The same notice said the design target for power usage effectiveness, or PUE, is no higher than 1.15 and that the green-power supply rate is above 95%. Baidu Baike and other Chinese summaries, which are less authoritative than government notices, have also cited claims that cooling-related energy use can be held below 10%, with savings in water and land use versus conventional data centers. (mot.gov.cn) Those figures should be read as project claims unless matched in company filings or independent audits. ### Is this really about AI, or just a data center with a new power source? Chinanews said on May 15 that the facility is meant to support AI applications as well as routine network demand. Chinese reports have also said China Telecom's Shanghai unit placed part of its computing business in the underwater center, including an R&D platform, a domestic GPU innovation platform and cloud services. That is why some social posts and trade write-ups have described it as an AI data center rather than only a subsea data center. (baike.baidu.com) The public record, though, points to a broader compute facility rather than a site built solely for one AI model or one company. Government and state-media descriptions emphasize "computing power" infrastructure, green electricity and cooling efficiency more than any single AI service. ### What comes next? The clearest next milestone in public reporting is the full buildout. (chinanews.com.cn) The Ministry of Transport said the Lingang project is planned in two phases with total capacity of 24 megawatts, beyond the 2.3-megawatt demonstration phase already disclosed. Chinese reports published in May and June indicate the site is being presented as a template for larger coastal computing infrastructure tied to offshore renewables. (mot.gov.cn)