<正>THE 2,298-kilometer Beijing-Guangzhou High-speed Railway officially opened to passengers on December 26, 2012. The occasion marked China’s successively overcoming the technical difficulties associated with sustaining high-speed train journeys over very long distances. With the Qinghai-Tibet Railway which opened in 2006-the highest railroad in the world, that runs across 550 kilometers of permafrost-China could lay claim to the world’s most