Postgraduate re-examination is an important part of the postgraduate examination system, that is, the second examination organized by the applicant institution after passing the postgraduate entrance examination (initial examination). Generally, it is also divided into written test and interview. Most of the early postgraduate re-examination is a form, but since 2006, graduate enrollment has increased the weight of re-examination, and some enrollment units even increased the weight of re-examination to 50%, which requires candidates to have real talent and higher adaptability.