Think Japan and you’ll almost certainly think of its streamlined Shinkansen bullet trains. But China is now the undisputed high-speed rail champion, with not only the world’s largest network – spanning over 50,000km, and connecting 97% of cities with over 500,000 residents – but the world’s fastest trains. And the speed limit is about to be broken once again, with testing underway of a new high-speed CR450 train which can run up to 450km/h.China's new CR450 bullet train.This is the successor to ...