As the top higher education institution in China, Peking University provides a variety of open class resources for students and the public to learn high-quality course content for free. The following are several common ways to listen to the open class of Peking University:

1. Peking University Open Class official website: Peking University Open Class official website is the main way to obtain open class resources. This website provides a rich curriculum classification, including courses in humanities and social sciences, natural sciences, engineering technology and other fields. Users can choose corresponding courses to study according to their own interests.

2. Peking University MassiveOpenOnlineCourse platform: Peking University massive open online course platform is an online course platform opened in Peking University, which provides a large number of open class resources. Users can register accounts on the platform and choose courses of interest to study. The platform also provides learning progress tracking, homework submission and other functions to facilitate users' learning management.

3. Peking University Video Open Class: Peking University also recorded some high-quality courses as videos in the form of video open classes for users to watch online. Users can find the courses they are interested in to watch by searching the relevant keywords of the open video class of Peking University.

4. offline lectures of Peking university: in addition to online open classes, Peking university will hold various offline lectures regularly. These lectures cover various disciplines and are given by professors and experts from Peking University. Users can get information about the time and place of the lecture by following the official WeChat account of Peking University and the school official website, and go to the site to attend.