The open policy of Peking University Library is to make full use of library resources and promote the wide spread of knowledge and information. As an important part of colleges and universities, libraries not only serve teachers and students on campus, but also shoulder the task of providing academic and information support for all walks of life. Opening to the outside world can attract more readers, enhance the influence of Peking University Library, strengthen the contact and interaction between universities and society, and promote the development of regional culture.