It depends on which magnetic stripe is selected in that library. Generally, if you borrow a book, it will demagnetize you (it may not be wiped clean) so that it won't ring when you pass the door, but there is another case where a permanent magnetic stripe is attached to the book and it won't disappear. Even if you borrow it, it will ring when you pass the door. Generally speaking, the library is not allowed to take borrowed books to the reading room, but all the books you can borrow from the library are available in the reading room, because the library should ensure that as many readers as possible read books, so you can read this book in the reading room with it or consult the staff.