Hainan is an island and while a tunnel is planned, the current solution is to ship the rail cars across in a ferry, which creates a bottleneck and makes the lin

Hainan is an island and while a tunnel is planned, the current solution is to ship the rail cars across in a ferry, which creates a bottleneck and makes the line not that fast overall. But it's still pretty convenient, especially if you consider that for most people the alternative wouldn't be a plane but a car, which has the same difficulty crossing the strait. https://en.wikipedia.org/wiki/Guangdong%E2%80%93Hainan_railway https://en.wikipedia.org/wiki/Guangdong%E2%80%93Hainan_railw...