Applying for a doctoral supervisor in Tsinghua University is a relatively complicated and tedious process, including selecting a tutor, contacting a tutor and submitting application materials. During this process, if you contact your tutor in Tsinghua, generally speaking, your tutor will reply to your email or message within 1-2 weeks.

However, due to the personal arrangement and busy work of the tutor, the response time may be different. If you don't get a reply to your email or message, you can consider 1-2 weeks before contacting your tutor, or by other means, such as telephone or WeChat. In addition, it should be noted that tutors may be busy in some time periods, such as final exams, mid-term exams, and paper deadlines. And they may be slow at this time. If you are in urgent need of a tutor's reply, you can politely remind them in the email and explain your situation and needs.