摘要
WHEN railway constructionworkers first came to theQinghai-Tibet Plateau, they were amazed at the majesty ofits snowfield scenery. Cut off from theoutside world, everything on the plateau- its snow-capped mountains, grassland,lamas, prayer banners, the Potala Palace,and the Tibetan people living 4,000 metersor more above sea level, has an aura ofmystery.Beautiful it may be, but Tibet lags behind other areas of China. Inadequate transportation facilities restrict its economic development, as it is only accessible by highway or air transportation.