Proposed high - speed rail would connect Inner Mongolia with Mongolia , which are more than 3,000 kilometers apart . China 's longest high - speed rail line is almost 2,300 kilometers long , between Beijing and Guangzhou . Train would open access to some of China 's remotest areas for tourists .
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 . Train would open access to some of China 's remotest areas for tourists .