Children's English training, there are indeed many English training institutions here in Jinshan District of Shanghai. I recommend Lezhi English.

Cambridge children's English course, open teaching, providing free audit. /children/sessions.html。

You can enter any class and see the situation of teachers and formal students. Think about the open class when I was a child. As long as someone listens, the teacher will prepare lessons well in advance. There will be a lot of excitement in class, and the effect of students' learning after a class is much better than usual. I suggest you compare it. After all, it is not easy to make the daily lectures public.