The Qinghai-Tibet Highway experienced four renovations in the past 40 years and has now been asphalted. For the fourth renovation, some 1.17 billion Yuan was consumed. It is now a modern highway. Extending 2,100 km from Xining of Qinghai to Lhasa of Tibet, it became 1,937 km after re-working. It goes 1,400 km in Qinghai.The Xining-Golmud section crossed many mountains and many rivers,extending 782 km. The Golmud-Lhasa section crosses four mountains—Kunlun Mountains (4,700 meters), Fenghuoshan Mountain (4,800 meters),Tanggula Mountain (5,150 meters above sea level at the mouth) and Nyainqentanggula Mountain, and crossed three rivers---Tongtianhe River, Tutu River and Curmar River with an average elevation of 4,500 meters. The Highway extends 544 km in Tibet. More than 80 percent of goods were transported through the highway.
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