“To build a railway on the Qinghai-Tibet Plateau? It is a big joke!” This was what most experts’ reaction throughout the world when the Chinese annouced to constructed the Qinghai-Tibet Railway. They did not believe that Chinese engineers could build a railway at high altitude.
Yes, it seemed impossible to build the railway on the Tibetan plateau featuring high altitude, harsh climate, lack of oxygen and permafrost. The permafrost was the biggest obstruction.
Until today, the railway has been put in use for more than 7 years safely. Millions of travelers have traveled by the Tibet train. Most of the travelers think highly of this railway.