The railway is the world's longest plateau railroad, extending 1,956 kilometers from Qinghai's provincial capital Xining to Lhasa in Tibet. The newly completed Golmud-Lhasa section zigzags 1,142 kilometers across the Kunlun and Tanggula mountain ranges. About 550 kilometers of the tracks run on frozen earth, the longest in any of the world's plateau railways. Tanggula Railway Station, 5,068 meters above sea level, is the highest railway station in the world. Fenghuoshan Tunnel, 4,905 meters above sea level, is the world's most elevated tunnel on frozen earth. Kunlun Mountain Tunnel, running 1,686 meters, is the world's longest plateau tunnel built on frozen earth.