Children's English training, there are indeed many English training institutions in Da Lang. I recommend Lezhi English. Cambridge children's English course, open teaching, providing free audit. 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.