Some specialized courses, that is, detailed interpretation of literary works, are the same as high school Chinese classes. The work reads well, but once it is interpreted, it feels boring and meaningless. So I basically spend such classes on my mobile phone. When I hear interesting knowledge, I will write some notes in the book and occasionally read it with kindle. Whether taking photos or copying PPT, I basically haven't opened it after class, and most of the things are sorted by myself.