China Completes First High Speed Rail Tunnel Under Yangtze River China has completed the first tunnel under the Yangtze River as part of its ambitious high speed rail project. The 11.
9 kilometer long Caiyuanba Yangtze River Railway Tunnel will link two districts in Chongqing, a city already known for its challenging geography and fast paced development.
The tunnel's significance extends beyond local transit, marking a crucial step towards integrating China's vast landmass with its globalized coastal hubs.