Proposed high-speed rail would connect Inner Mongolia with Hainan , which are more than 3,000 kilometers apart . World 's longest high-speed rail line is almost 2,300 kilometers long , connecting Beijing and Guangzhou . Though the exact length of the proposed route has not been released , it will likely become the world 's longest high-speed rail line -- smashing a record already held by China -- Comment:
Proposed high-speed rail would connect Inner Mongolia with Hainan , which are more than 3,000 kilometers apart . World 's longest high-speed rail line is almost 2,300 kilometers long , connecting Beijing and Guangzhou . Comment: