What you said upstairs is good. Xiyuan Bookstore is the largest and most comprehensive second-hand bookstore in Fudan University. Enter the main entrance of Fudan (opposite the door of the portrait of the chairman) and turn right directly (you don't have to follow the billboards on both sides to the portrait of the chairman). There is a path leading to Sunrise Garden (if you are not careful, you won't notice it because it is almost behind the reception room). Clothing stores, electronic goods stores and bookstores are side by side with the bookstore in the middle. The door is small, so be careful. The bookstore is still quite large, with two floors. Moreover, books are clearly classified, unlike other old bookstores, so I often go there. All the books there are 50% off (except new books, of course, there are few new books, most of which are on the counter in the boss's hand). Xiyuan Bookstore, after all, is mainly a second-hand bookstore, and the new books are mainly true titles of CET-4 and CET-6 and unopened original English novels. Many books are not used much, and the basic new ones are 50% off! So I often wonder if my hands are brand new. I asked the boss if it was old or new, and the answer was that most of them were sold at 50% discount!

There is also a bookworm second-hand bookstore, with two. One is next to the canteen in the southern district (the southern district is a dormitory living area, where many students can ask for directions, not to mention the canteen in the southern district). I have been to this one once, which is smaller than Xiyuan's, but most of the textbooks are satisfactory. There is another street in 13, North District, so I won't comment if I haven't been there.

There is also a small second-hand bookstall (not a bookstore! ), there is an open space of horizontal bar basketball court opposite our headquarters dormitory, next to which there is a bicycle stall, a copy shop and a book stall. There are few books there, but they occasionally surprise people. I once looked for several mathematical analyses without Zhuo Ritchie (including Xiyuan Bookstore, which I go to almost every week), and later found them here.

I hope my answer can help you!