Thanks! I am asking since I am not sure it this is aligned with some of my childhood memory. Back in my days as a pupil in China, I don't have to bind the book

Thanks! I am asking since I am not sure it this is aligned with some of my childhood memory. Back in my days as a pupil in China, I don't have to bind the book but still need to buy two things for each new textbook: 1. A plastic separate "binder" like thing, which can be attached to the glued together side of the book. Since the textbook are glued together in factory, this additional binder makes the book more solid. 2. A plastic protect wrap to cover the book back/front covers. I used to hand-make these wraps from a very large paper as well, since it looks more "personalized" and cheaper.