and long distance journey and the high altitude sickness. Thus the windows cannot be opened and people cannot litter things out of the train. And due to its tight sealed up, there is oxygen like in the plane filled in the trains. This oxygen may help you a little bit to reduce the altitude symptoms.

Secondly, thinking of the long journey on the train (please refer to the time-table of the train), the hard sleepers were also built in to the compartment style and tourists can sleep soundly and deeply without the noise. And the seats were built in to a sofa style to people to comfortably be seated on.

And also the soft sleepers were built in to deluxe compartments style with liquid crystal screens inside. There are two or three Pull-Machines or Engines.