Diploma, according to its definition in Chinese Dictionary, "now refers to the written proof of educational level, including graduation certificate and degree certificates of various educational levels". In other words, diplomas include not only diplomas and degree certificates of various educational levels, but also graduation certificates of various educational levels.

The national Measures for the Administration of Professional and Technical Qualifications stipulates that "when full-time undergraduate and junior college graduates apply for professional and technical qualifications, their academic qualifications can be treated as graduates with low national education, that is, undergraduate graduates are regarded as junior college graduates and junior college graduates as secondary school graduates. Graduates who have received postgraduate education but have not obtained academic qualifications and master's and doctoral degrees are treated according to the highest national education qualifications obtained before. " In the postgraduate enrollment method, it is also clearly pointed out that "undergraduate graduates have the qualification to apply for graduate students, and they can also apply for the second undergraduate degree at the starting point of the college".