1) The most direct way is to go to the school's graduate admissions homepage, which generally has the introduction of the tutor, some have the tutor's email address, and some even have a phone number (of course, they are all in the office, and the mobile phone number is relatively small).
2) It is more direct to contact the graduate brothers and sisters admitted to the university. Of course, you can contact your brothers and sisters through our school contacts and online search, such as university forums. If not, you can also search on Renren. I wish you success!