It should be impossible. . If you know your classmates, you may be able to mix in the big class, but generally speaking, the courses in the conservatory of music, especially the specialized courses, are all small classes, and the teachers are all one-on-one. Why did you say you wanted to sit in? The location of the Conservatory of Music is the east gate of the central campus of Qingdao University. It goes uphill on the left, the first building. It's called Deya Building. The entrance to the piano room is on the left, and outsiders are not allowed to enter.