China now has almost 10,000km of high speed rail track but on the last Friday of the New Year holiday 5.8 million pasenger trips were made needing an additional 672 trains. This holiday rush even has a name, 春运,chūn yùn. The high speed trains are clean, comfortable and modern. Seating is comparable to that in an airplane. Most tickets are for assigned seats; no-seat tickets are sometimes sold in limited numbers, but unlike regular Chinese trains, there is never a mad crush with more people sitting in the aisles than in seats.