How to file a complaint against a teacher at Longshi Central Primary School?

Hello, I first suggest that you communicate with the teacher. There may be some misunderstanding between you two. If you really want to complain, you'd better call the academic affairs department of this school to complain. However, I suggest you not to do this, because it will not have much effect, and the school cannot say that it will fire a teacher because of a parent's complaint. At most, it can give a warning, or understand the reason for the matter, and hope it will be adopted