You can enter without a license, just tell the librarian; The first floor is the study room, the second floor is generally some archived materials, and the third floor is the book lending department and computer book lending department of Lantai. I generally know these things. You can go there to read, or you can go to the third floor to have a look. There are some new books on display on the first floor. I feel that borrowing books there is still relatively straight.