In universities, teachers adjust classes at will without the consent of students. This is not to say that it is unreasonable. Because sometimes you have already arranged the start time, and once you change classes, it will upset your plan, which is really wrong.

But generally speaking, the teacher has to adjust the class, which proves that he may really have something to do during that time, so he adjusted it. If our business is not that important, we'd better understand the teacher.

In fact, since I went to college, our teachers have always agreed to adjust classes, and they have always consulted us to determine which time to adjust when they are free.