What class are you going to take first? Because there are too many classes, I can't give you all. If you want to check the schedule, you must log in to the school official website. It seems impossible for people outside the school. . . I suggest that you pay attention to the WeChat platform of "Peking University Tsinghua Lecture Hall" or its Weibo, which will push some classes and lectures of Qingbei people and other Beijing universities. At the beginning of the semester, some schedule information will also be released. I hope it helps you.