Does the train from Lhasa to Xining provide oxygen?

The train from Lhasa to Xining provides oxygen. The Qinghai-Tibet railway train from Lhasa to Xining is equipped with air conditioning and oxygen supply system. The oxygen concentration, temperature and pressure in the carriage are balanced. The configuration of each carriage is almost the same as that of an airplane, and there are two sets of oxygen supply systems: one is "distributed" oxygen supply, which keeps the oxygen content of each carriage at a suitable level by mixing the air in the air conditioning system, making passengers feel like entering an "oxygen bar". The other set is independent interface oxygen inhalation. If passengers feel uncomfortable and need more oxygen, they can breathe with oxygen inhalation tube at any time. In the soft sleeper, hard sleeper and hard seat carriages of Qinghai-Tibet Railway, each bed or seat is equipped with a passenger oxygen inhaler, which is located on the bed wall or under the seat within reach.