/kloc-what were the classrooms like in China more than 0/0 years ago?

There are many people and the distance between desks is small. Ten years ago, when I walked into the classroom, there were many children. Many teachers use bees in class for fear that students in the back row can't hear clearly. When students stand up, they always meet the front and back tables. When the teacher stepped off the platform to interact, he could only pass sideways, hunched his back when giving lectures, and the classroom was small and there were many students, which was the most typical feature of teachers in China ten years ago. The classroom is where the teacher gives lessons to the students. This is a big room with a podium in front and seats in the back.