The world’s first commercial underwater data centre is now operational in China’s Hainan, as the island province pushes to attract foreign investment by expanding the blue economy in the country’s largest pilot free-trade zone.The servers manage digital services from restaurant recommendations to travel hacks, and will be installed in a 1,300-tonne underwater data cabin – equivalent to the weight of 1,000 passenger cars – after the first phase of construction was completed in Lingshui county...