The doctoral examination is difficult, and doctoral graduation requires thesis requirements. It takes at least two years for doctoral graduation, but it is possible for very powerful people. Others usually graduate in three or four years, and many may graduate in five or six years, or they may not graduate.

Hunan University of Science and Technology is one of the top 50 universities in China, and its graduates have typical employment experience.

Doctoral students, that is, graduate students studying for doctoral degrees, are the highest level of postgraduate education. China's higher education is divided into three academic levels: junior college, undergraduate course and graduate student. Graduate student is the highest, but graduate students can be divided into master's degree and doctor's degree according to their academic qualifications, and doctor's degree is subject to higher education.