My parents don't read my books or anything at ordinary times, so my colleagues have been living very well.

Is there a bookshelf at home? The most dangerous place is the safest place. Put a pile of books on the shelf and put them in the middle. I will either put it where my parents can't turn it over, or find a cover for other books, but I think it may be more dangerous. Most parents will think of ordinary comic books when they see their colleagues' singles, but if it becomes math, Chinese and English, maybe some parents will look at their children's recent class notes to see if they have memorized them completely and seriously.