The Qinghai-Tibet railway, the world's highest, commenced operations in 2006, connecting Beijing to Lhasa. The inaugural train carried 600 passengers and 100 journalists, offering a more affordable travel option compared to airfare. This engineering feat, often referred to as the 'sky train,' featured distinct Tibetan cultural elements in its design. AI
RANK_REASON This is a historical news item about a major infrastructure project, not a current AI development. [lever_c_demoted from significant: ic=1 ai=0.0]
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