美国的火车旅行家保罗·泰鲁说:“有昆仑山脉在,铁路就永远到不了拉萨。”瑞士的一位隧道专家更是断言,穿越昆仑山的岩石和坚冰根本不可能。然而,就在2006年7月1日,全球穿越永久性冻土地区最长的高原铁路——青藏铁路正式开通了。“天路”的开通凝聚了数万建设者的心血,也圆了几代中国人的梦。在这项浩大的工程中, The US train traveler Paul Tairu said: “The railways will never reach Lhasa if there is a Kunlun mountain.” A Swiss tunnel expert even asserted that it is simply impossible to cross the Kunlun mountains with rocks and ice. However, on July 1, 2006, the Qinghai-Tibet Railway, the longest plateau railway running through permanent permafrost regions, was officially opened. The opening of “Heavenly Road” embodies the efforts of tens of thousands of builders and rounds the dream of generations of Chinese people. In this vast project,