1, you can go to the post bar, official website, the school, find students from the same school and college to get to know each other and explain your intention, so that students from our school can get it more easily. Students in the teacher's class usually leave their phone numbers.
2. If you have friends or classmates you know, you can get the contact information of the tutor through introduction.
If you have time, you'd better go to the school in person, so that you can know more directly about your postgraduate entrance examination.
This is my personal opinion. You can choose how to get it according to your actual situation. If you only need the contact information of the tutor, either the first or the second one will do. If you want to know more, I suggest the third one, direct and reliable.