1, Higher Education Bookstore: a completely free learning materials website, including all electronic teaching materials used from primary schools to universities, and classified according to educational resources of different grades, including higher education, higher vocational education, five-year vocational high schools, examination books and basic education.
2. National Library of China: an online education website made by the state, which can search the teaching materials used by various majors in universities. Open the home page, you can see the educational resources such as books, periodicals, papers, audio and video, and support the powerful learning resource search function.
3. Science Library: A super-rich website of electronic teaching materials, where books for university majors can be found basically. Different teaching materials are classified in detail, including books on mathematics, chemistry, agriculture, forestry, medicine, information, engineering and economics.