He may beat him over the head, shoulders, and back. The parents expect the teachers to keep the children hard at work in school. In China education is held in high respect. The government offices are held by educated men who have passed the examinations. So every Chinese father and mother wants his child to become wise.
Education is also a part of their religion.
Their religion teaches them to love their parents and to respect learning. You would not like to study in these Chinese schools. It is very hard to learn to read or to write Chinese. Instead of having a few letters to represent sounds, the Chinese have a picture language. Of course the children learn only about 2,000 of them, but that is hard enough.