
The Qinghai-Tibet Railway, which starts from Xining, capital of northwest Chinas Qinghai Province, and ends in Lhasa, capital of southwest Chinas Tibet Autonomous Region, is the first railway ever to go to Tibet. Before the plateau railway began service, people reached Tibet only via air or highway.
Some 550 kilometers of the 1,956 km history-making railway are built on frozen earth.
Close observation results indicate that 95 percent of the roadbeds built on frozen earth underwent minor changes in the July-September period when temperatures on the Qinghai-Tibet Plateau are at their highest, said Sun, who was formerly Vice Minister of Railways.
According to Sun, the annual sinking rate for the railways frozen earth roadbeds will be less than 2 centimeters.
Source: China.org.cn via Xinhua News Agency