First, send the email first, let the tutor have an impression on you first, and pay attention to the format of polite email. E-mail can be found on the website of your Wuhan University College.

Second, looking for classmates and other relations to find the teacher's phone number, you can send a message first, explain your situation, or ask some questions. (indicating attitude)

Third, if the first two stages go well, you can visit them. Facts have proved that meeting is beneficial regardless of performance. (Gifts must be carefully considered)

Of course, I only sent an email last year when I was admitted to the graduate school of Wuhan University, and I haven't received a reply yet. However, when the tutors saw that they didn't come back for various reasons, they called the tutors before the second interview to avoid suspicion, but it still worked, and the gifts were sent later.