There's a difference between some students going that way for whatever reason -vs- copying work being absolutely normal and generally expecting that this is the way to go. There are many articles talking about it if you google. Some connect it to "you advance to a university or stay rural with your family forever" situation, some with other factors.
No, Chinese stidents, as claimed in another post, were taught to respect hierarchy. Their colluding is the result that it's a working way of game the system.