13 is most likely physical or historical. At present, the total score of Jiangsu college entrance examination scheme is low, which leads to a low degree of score differentiation. The most obvious thing this year is that the gap between this first line and this second line is only about 25 points, which is the smallest gap over the years. Many students who are confident to take one of the first and second models rarely notice that their scores are only enough for senior three or higher vocational education, resulting in great psychological contrast. The difference between students' estimated scores and actual scores makes marking and statistics on thin ice, because the difference between one and two points is the change of two thousand rankings. There are also some unfavorable factors in the current scheme for the enrollment selection and allocation of colleges and universities, and the scheme cannot be fully understood by colleges and universities, resulting in very few places added every year.