I recommend looking at this map that includes all planned rails in gray.
Look at the one connecting Dalian and Yantai across the Bohai Strait (the one that forms a bay in the Northeast, near the Koreas). That’s 120km of underwater tunnel, already in construction, planned to open in 2030
I recommend looking at this map that includes all planned rails in gray.
Look at the one connecting Dalian and Yantai across the Bohai Strait (the one that forms a bay in the Northeast, near the Koreas). That’s 120km of underwater tunnel, already in construction, planned to open in 2030
Edit: High res picture