Preparatory class is the policy of college entrance examination for ethnic minorities, which stipulates that ethnic minority students can choose preparatory classes freely if they need to be admitted to the second line.

Guizhou Normal University is a school with preparatory classes for ethnic minorities. According to the results of preparatory classes and the number of students enrolled in previous years, the results of preparatory classes are controlled to be about 0/2 higher than the second line/kloc-,and the school enrolls students from high to low according to its own enrollment quota. Therefore, the admission scores of preparatory classes in Guizhou Normal University are affected by the two scores and the number of students enrolled, and those with two or less scores may not be admitted to preparatory classes in Guizhou Normal University.