The document discusses the challenges and solutions involved in building a railway connecting China and Tibet. Some key points:
- Constructing a railway across the Tibetan plateau presented formidable obstacles like mountain barriers, permafrost, and protecting the fragile ecosystem.
- Engineers had to develop solutions like stone embankments and thermosiphons to build the railway across unstable permafrost.
- Over 2.5 billion yuan was invested in environmental protections like selecting routes to avoid wildlife habitats and including 25 passageways for animals.
- The 1,956 km Qinghai-Tibet Railway stretching from Xining to Lhasa cost 4.1 billion USD and was completed ahead of schedule in 2006.