Most of them are local rich people with a little culture. They want to get rich when China attaches importance to education now. Their mentality level is often very rough. We call this "disregard for human life"
In addition, the treatment of workers there is also very poor. People with a little salary don't want to work there at all, and they are all technical secondary schools. They know that their education can't make any money, so they naturally refuse to leave when they finally meet the opportunity. If they all fail in the exam, how can they teach their children?