At present China has the world'. On December 25;s longest high-speed network, high-speed network is rapidly expanding;s average speed of 200 kilometers or more;s strong support;s high-speed rail network by China railway company operation, China started the longest line in the world. Under the government'. High-speed rail service introduced into China in 2007, 2998 km, the route from Beijing to guangzhouChina'. The network covers all commercial high-speed train service, the train', 2012, operating in the line of about 9300 kilometers