Entering the first main entrance, there is a gate (just like swiping a card in the subway), but it has never been used. You can go directly in. There is a reading room inside. Generally, you need to swipe your library card with the teacher watching, but the teacher is not there, or you go in directly, and the teacher generally won't check it. At most, I forgot to bring my card when I asked. The key is that you should be from this school, no problem.