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Qinghai - Tibet Railway winds its way through the Kunlun Mountain in Wudaoliang area in northwest China's Qinghai Province, Saturday, October 4, 2003. Chinese construction workers have completed the track - laying on 287.25 km of the 1,956 - km-long Qinghai-Tibet railway route, with the highest elevation of any rail line around the world, by the end of September. (KEYSTONE/EPA PHOTO QI ZI/Str)