If you want to ask a question to a famous teacher, I suggest you make clear the subject or field of the question first, and choose and contact a famous professional teacher in related fields according to the help or suggestion you need. Generally speaking, you can contact through the following channels:

1. You can directly follow their accounts on professional social networking platforms, such as Linkedin and Twitter, and contact them by private mail or email.

2. You can participate in their online or offline activities, such as academic lectures and open classes, and communicate directly in your own questioning session.

3. Ask questions in forums and social groups in related fields and seek advice and answers from experts in other industries.

Before asking questions, please make sure that the questions are clear and short, and try to avoid vague and ambiguous questions, so that the famous teacher can better understand and answer the questions. In addition, we should also pay attention to politeness and civilization, respect the time and professional knowledge of famous teachers, and do not abuse and occupy other people's resources.