I have received the admission notice for graduate students. What should I say to my tutor? (I contacted my tutor before and he agreed to take me. )

Needless to say what? Academics and society are different. Don't say anything. If you feel a little uncomfortable not saying anything, send a text message to show your determination, such as studying hard. Have you received the admission notice? It's a second interview notice, right? Not bad! 34 universities, 985! Come on, look at you.