1. If your strength is not an absolute advantage, don't report to the popular tutor. Although popular tutors have great fame and scientific research, there are too many students to manage.
2. Many people may not know about the tutor. At this time, they need to contact informed graduate students to understand the tutor's personality and research direction, the employment situation of previous students, the changing trend of enrollment and the current number of students.
One of the most direct methods is to search the papers written by the tutor. Basically, every tutor's thesis reflects his research direction, not what he tells you face to face.
I hope I can help you.