In 2008, the second entrance examination for mathematics was very difficult. Judging from the relevant data, the entrance examination for mathematics in 2008 is more difficult than in previous years, and the majority of them have test scores below 100, followed by 2007. Postgraduate entrance examination refers to the national unified postgraduate entrance examination, which refers to the general name of the relevant examinations organized by the education authorities and enrollment institutions for the selection of postgraduate students.