In these two days, many travelers went to the Beijing railway station to buy Qinghai-Tibet railway tickets. They would like to experience the fresh feeling of entering Tibet on board a train, but fear that there is no sufficient oxygen supply up on the Qinghai-Tibet Plateau. Relevant experts indicated that adequate preparation had been made in this area. The train has a reliable oxygen supply system. Toxic gases would not be generated during the process of producing the oxygen, and the amount of oxygen in the railway carriages would not be affected significantly when the train door is opened as the train pulls in at a station. Experts stated that in order to deal with the oxygen deficiency problem in the high altitude environment, Qinghai-Tibet trains are specially equipped with oxygen supply systems, with two sets in every compartment. One set provides oxygen supply through the method of diffusion. It mixes the high-oxygen air produced by oxygen generators and those from air conditioning systems and sends them to every corner in the compartments through delivery conduits. In this way, the oxygen content in each compartment reaches 23.5%, and could go as high as 25% when needed. The other set is a centralized oxygen supply system. Every passenger is able to directly breathe in high-concentration oxygen through special openings and oxygen masks. It is designed to satisfy special passengers’ demands for high-concentration oxygen in the oxygen-deficient environment up on the plateau. Experts specifically pointed out that when passengers get in and out of the train at the plateau area, loss of some oxygen is inevitable due to the fact that the carriage doors are open and there is a concentration differential for the oxygen inside and outside the train. However, there is no need to be overly worried about this problem. When the doors are closed, the oxygen concentration inside the train would return to the original level in less than half an hour, because the oxygen supply system keeps working all the time.