How does Dr. Kao contact his tutor?

Reply means to show you that he has a doctoral supervisor position before seeing your specific strength. You are welcome to apply for the exam. If you pass the exam, you will be considered as his student.

It's normal for the tutor to reply to the email if you take the doctor's exam, so the best way is for teachers who are interested in each other to try to ask if they have free time to meet, but don't force it. After all, some teachers are just being polite. On the question of choosing a teacher, it's best to cut the gordian knot quickly and don't get tangled up.

Note:

First of all, choose your major and tutor carefully. You must choose the major you are interested in. You can't rush for a diploma to study for a major. Studying for a doctorate is a painful and long process, and an inappropriate major will make this process even more painful.

Secondly, contact your tutor before the exam to confirm his intention to accept you. Never think that you can get a high score before contacting, because the number of tutors is limited.

Finally, strengthening your English, especially reading and writing, is the focus of the exam. Generally, if English crosses the line, the tutor is willing to accept it, and specialized courses will not be a problem.