Not sure which countries will pay, but the article notes this undersea train network would also connect with Canada and Russia:
> China Railway first unveiled the 8,000-mile high-speed underwater railway project in 2014. The underwater train will connect China, Russia, Canada, and the U.S. including a 125-mile undersea tunnel spanning the Bering Strait then to Alaska.
> Beijing Times also reported that Russia is already onboard.
> China Railway first unveiled the 8,000-mile high-speed underwater railway project in 2014. The underwater train will connect China, Russia, Canada, and the U.S. including a 125-mile undersea tunnel spanning the Bering Strait then to Alaska.
> Beijing Times also reported that Russia is already onboard.