2. The tutor's mobile phone number or office phone number. Personally, I suggest that the tutor's office phone number is better than the tutor's mobile phone number. In the university, the tutor's mobile phone number is relatively private and generally handles personal affairs. It is more appropriate to use the office phone for work, which will not cause the rejection of teachers.
3. The tutor's laboratory or the office phone number of his brothers and sisters in the laboratory. It is also a good way to contact teachers in this indirect way and inquire about the tutor information you need. Especially when some students need to meet their tutors, they can call in advance to find out when the teachers are in the office, their preferences, matters needing attention when meeting, and so on. Tutors really play an important role in graduate students' study and entrepreneurship. Graduate students basically implement the tutor responsibility system during their study, and tutors guide and supervise graduate students' study and life like class teachers. Compared with other teachers, tutors can usually provide you with more support in study and research. Mentors are likely to have cordial exchanges with their graduate students and establish sincere feelings like father and son or brothers.