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Workers on the Qinghai-Tibet Railway built more than just an engineering wonder – they also created a wonder of life.CONSIDERING its aver- age altitude of 4,500 me- ters above sea level, its thin oxygen levels and a minimumtemperatureof around 40.8oC bel
Workers on the Qinghai-Tibet Railway built more than just an engineering wonder - they also created a wonder of life. CONSIDERING its aver-age altitude of 4,500 me- ters above sea level, its thin oxygen levels and a minimumtemperature of around 40.8oC bel