According to the requirements of postgraduate entrance examination, candidates' postgraduate photos must be taken within the last three months, so this is a hard rule, so candidates can't use previous photos instead when registering for postgraduate entrance examination.

The national unified postgraduate entrance examination (hereinafter referred to as "postgraduate entrance examination" or "unified examination") refers to the general name of the relevant examinations organized by the education authorities and enrollment institutions for the selection of postgraduate students, and consists of the initial examination and re-examination organized by the national examination authorities and enrollment units. It is a selective examination, and the type of academic qualifications admitted is general higher education.

Postgraduate enrollment in general higher education is divided into academic master and professional master according to degree types; According to the form of study, it is divided into full-time graduate students and part-time graduate students, all of whom use the same examination subjects and the same score line for selection and admission.