If a preschool has a bad impression about his teacher since first meeting pa lang, how do you convince him to go back to class and listen to that teacher?

Hi, I think more than him you will have to speak to your teacher. You have to be honest with the teacher and have to tell her how the kid kind of felt scared of you and doesn't want to come to school. So, the teacher will have to come in front to break the ice and make the child comfortable. And meanwhile you can talk to kid good things about the teacher. Like when he wasn't around teacher spoke so well bout him and the activities that she looks forward to do with him, and perhaps sharing food with the teacher.