Inside China’s 113-metre deep undersea tunnel: How a mega rail project could rewrite high-speed travel | World News
Beneath the restless waters of southern China, something vast is slowly taking shape, far from public view and yet reshaping how entire cities may soon connect. It is not visible from ships passing above the Pearl River Estuary, nor from the coastline where ferries cut across busy routes every hour. But deep under the seabed,…