Qinghai-Tibetan platear is known as the “World Roof”,the “Third Pole of the Globe”, it is the original place of many big rivers in China. Qinghai-Tibetan railways is about 1142Km long, 960Km of which runs on the highland of  more than 4,000m and 550km of it passes across the all year round frozen earth. Qinghai-Tibetan railway has 34 stops which are located at Nachitai, Tuotuo River, Mt. Tanggula pass, Amdo, Nagchu, Damsung, Yangparchen and Lhasa etc. 7 sightseeing platform are specially built for the passengers’ enjoyment where the trains will stop for 10 to 30 minutes. The train can drive 160Km/hour with the most luxurious carriages equipped with the advanced facilities such as oxygen-supplying, pressure-balancing system etc. It takes about 50hours getting to Lhasa from Chengdu, you can appreciate the beautiful scenry during the daytime driving hours. It is said by Yu Yungui on August 9, 2006, the vice commissioner of the Shigatse Administrative Office in Tibet Autonomous Region, the first feeder line of Tibet Railway, extending from Lhasa to Shigatse, the second largest city in Tibet, will be constructed next year.