September. Textbooks will be published in the annual postgraduate entrance examination outline. The annual postgraduate entrance examination outline is expected to be released in September. The exam outline is a very important official document, which explains the exam form, the composition of the test paper, the structure of the question type and the content of the exam to the candidates. The outline of postgraduate entrance examination refers to the authoritative policy-oriented postgraduate entrance examination book written by the examination center of the Ministry of Education and published exclusively by the Higher Education Press, which stipulates the examination scope, requirements, forms and paper structure of the corresponding subjects of the national postgraduate entrance examination in that year. It is not only the only basis for the national postgraduate entrance examination proposition, but also a necessary reference book for candidates to review and prepare for the exam.