Legal basis: Article 2 of the Provisions on the Security and Secrecy of National Education Examinations, such as National College Entrance Examination, Adult College Entrance Examination, Postgraduate Entrance Examination and Higher Education Self-study Examination, implements the principle of "graded management and responsibility step by step", and the examination center of the Ministry of Education is responsible for the security and confidentiality of the propositions and proofs of the national unified examination papers (including answers and graded references, listening tapes, hereinafter referred to as the examination papers), and passes them. The security and confidentiality in the process of printing test papers are jointly responsible by the provincial education examination institutions and the national unified test paper designated printing units (hereinafter referred to as "designated printing plants"), and the provincial secrecy department is responsible for supervision and inspection; The transportation and storage of examination papers are respectively the responsibility of the provincial, prefecture (city) and county (district) level three education and examination institutions, and the provincial, prefecture (city) and county (district) level three public security and secrecy departments assist and cooperate with each other, and with the leadership and support of the local government, jointly do a good job in the security and confidentiality of the transportation and storage of examination papers.