How to contact the tutor after the second interview? What should I say?

Let's see if there are any younger brothers and sisters in this school. You can get to know the mentor through them first, and then contact the mentor. You can send a text message or email to your tutor, introduce yourself, talk about how you met your tutor (if it is said that you can get extra points through the introduction of your sister and brother), talk about your achievements, express your love for scientific research, and consult for a second interview. It's best not to call for the first time. It's too abrupt. Don't disturb the teacher during recess.