Politics and foreign language mathematics are unified national examinations. Every year, Ministry of Education of the People's Republic of China and other departments deploy some professors from various universities to form a research group. Of course, it is strictly confidential, and professional courses are different. So far, pedagogy, psychology, computer and history are all national exams, which are also organized by the Ministry of Education. However, I heard that the Ministry of Education usually designates famous universities to give questions in a certain year, but I just heard that other universities usually give questions by themselves. Well, how much water is there?