How to politely ask the tutor if he wants me?

Every year, when the graduate students are admitted to the second interview, as usual, I will meet several students who want to study with me, and this year is also the case. I have received calls from several students who want to contact their tutors, and their attitudes seem to be very firm.

In fact, for these students, my answer is the same for many years:

(1) I very much welcome you to work in our laboratory (this is the most important and basic attitude);

(2) The research direction and tutor of this laboratory are determined after your admission;

(3) At that time, all teachers will introduce their research direction and the number of people they want to recruit, and you can report three volunteers (with sufficient choice opportunities);

(4) Under normal circumstances (there is no limit on the number of tutors enrolled or the number of applicants does not exceed the limit), your wishes can be met;

(5) I won't make such a simple promise to any student (because I don't know if this student will change his mind when filling in his volunteer, and I don't know how many students I can admit this year).

(1) I very much welcome you to work in our laboratory (this is the most important and basic attitude);

(2) The research direction and tutor of this laboratory are determined after your admission;

(3) At that time, all teachers will introduce their research direction and the number of people they want to recruit, and you can report three volunteers (with sufficient choice opportunities);

(4) Under normal circumstances (there is no limit on the number of tutors enrolled or the number of applicants does not exceed the limit), your wishes can be met;

(5) I won't make such a simple promise to any student (because I don't know if this student will change his mind when filling in his volunteer, and I don't know how many students I can admit this year).

And so on. Such a reply will not completely disappoint any student, because there is no rejection; But it can't satisfy any student absolutely, because there is no commitment.

Therefore, due to various uncertainties, in general, it is difficult for tutors to give students too positive answers and exact information in their replies-so what criteria should students choose tutors according to?

Here, I hope to use my graduate experience and years of tutor experience to guide (and assist in guiding) graduate students and talk about such a serious topic as how graduate students choose tutors.