It's the night before China's October National Day, and close to 1,000 passengers are on the high-speed train bound for a place that was unreachable by rail until recently: Lhasa, Tibet.

China's first fully electrified bullet train is now on the tracks in the remote Himalayan region of Tibet The new railroad connects Tibet's capital, Lhasa, to the city of Nyingchi, about 423 ...