Oxygen Supply
The trains to Tibet are specially designed for the altitude the climate, so the train has two different oxygen supplying systems1. Central oxygen supplier, this is the main oxygen supplying system and it automatically increases 23% of oxygen in the train, when the train get higher and air get rarer this release more oxygen to adapt passengers need.
2. If some passenger feel uncomfortable and need more oxygen then every compartment has oxygen outlets and you will get oxygen tube from train officer, so you can directly connect the tube to the outlet and intake oxygen per your need.
