Slice and Dice - the Chinese way

What the hell is going on in China? I have read numerous stories lately about some nutjob slicing and/or stabbing people to death. Most seem to be school kids on campus. Usually the attacker is male. I know, in a country of 1.4 billion people, 7 or 8 attacks like these are probably within a normal range of occurrence but what triggers it? Video games? Kung Pow chicken? Guess what? It is illegal for civilians to own guns in China! All they have left is axes and machetes. That would be a downside for those in the U.S. who think we should ban guns. Everyone would resort to switchblades and samurai swords. Experienced knife-throwers would be the new snipers. 7-11 robberies would be interesting since a ball bat swung by the clerk could be very effective against a knife. Party revelers would probably be less inclined to throw their knives and hatchets in the air, since they would return to earth a lot closer to them than the bullets they were firing before the gun ban.