I saw this piece of news about 18 hours ago, wondering when it would turn up here.
It's not just about just the teacher not let the kids worrying about meaningless exams, it is the entire culture of education. In the far east, growing up, not only you have a background and culture of education is the key drone into you from an early age, the necessity of study and do good in school comes first and you are reminded of it every day. This idea of parents are happy with whatever their children do with their life as long as they are happy doesn't really exists if the child wants to be a bin man (no offence to bin man). They want their child to be successful and the most guaranteed way to be successful is through education.
Secondly, the parents puts pressure into the child to do well, then along with that, since everyone wants to do well, it creates a competition in a class room. You are rated against you peers in your school, ranked 1 - 400 (or whatever) in all subjects and then total rank in your year. In the UK, it causes uproar and would think a low rank on your child would be detriment to it's mental state...quite the opposite thinking in the far east. If you suck, you suck, stop moaning and do better next time. That's the truth so accept it, that is the attitude.
So the entire system, from parents in the home, from the mentality of the children, to the school are set up to push children better all the time. It would be impossible to put that here in the UK because there isn't that mentality to begin with. There will always be bright pupils who will do well and want to do well. But those who wants to coast through school will coast through school, if they go to school in the far east, they would probably be bottom of the class.