What if Guzheng teacher doesn't send class information?

In this case, the following measures can be taken:

1. Communicate directly with the teacher: You can directly ask the teacher why he didn't send the class information in time to see if there are any problems to be solved.

2. Email or SMS: If you have email or SMS contact with the teacher, you can email or SMS to ask the teacher for class information. This will help you keep in touch with your teacher and let him know that someone is waiting for his information.

3. Ask other teachers: If you are worried about the reason why the teacher didn't send the class information, you can ask other teachers if they received the information. This helps to determine whether information is passed between all students and teachers.