What you want to ask is, can Peking University go to class now? You can't. Not everyone can get in and out of Peking University normally. To enter Peking University, one must be a staff member or a student of Peking University with a teacher's or student's ID card. If you want to listen to the teacher's class, you must ask the other party's permission. Once again, if you want to attend classes for free, you must apply to the school.