The Bohai Strait Cross-Sea Channel is an ambitious engineering project that will represent a landmark in global civil engineering. This undersea rail tunnel will connect the two major ports of Dalian and Yantai by way of a 120-kilometre-long tunnel constructed beneath the seabed of the Bohai Sea, connecting the Liaodong and Shandong Peninsulas. Currently, transit is bifurcated for making this trip: an eight-hour ferry ride or a logistically inefficient 1,400-kilometre overland detour through land. The goal of the high-speed rail connection to be built beneath the sea is to reduce this trip to just 40 minutes, as noted in the study in Marefa. Trains will be able to travel at speeds greater than 250 kilometres per hour; therefore, this fixed transit link will facilitate the economic integration of the Bohai Rim and establish its position as a world standard for subsea infrastructure and high-speed logistics. This transformative infrastructure will synchronize regional markets, slashing transit times and creating a seamless logistical corridor across the Bohai Sea.
