I'm not sure. I don't teach in a "normal" school, but in a small centre. But I know that the kids are under great pressure from early childhood, so it is possible bullying is not such a big problem here, because they simple don't have the time for such things. They spend their time at school, then on after-school activities (piano lessons, English lessons, Mandarin lessons, violin lessons, drawing lessons, whatever lessons) plus huge amounts of homework, so their energy and attention is being eaten by their parents' expectations and school-related matters. Discipline above all. Fun? What's fun?
I had a discussion about bullying with my older students and all of them said no one ever bullied them. Still, I think it happens.