Universities generally refer to undergraduate courses, and then graduate students. Postgraduates are generally two or three years, and doctoral students are generally two years. There are postdocs behind doctors, but postdocs are not degrees.

The difference between postgraduate education and undergraduate education lies in that undergraduate education is exam-oriented education, postgraduate education is thesis education, and college entrance examination is the most common way of undergraduate enrollment. If you are a graduate student, it is the annual postgraduate entrance examination, which includes not only a very difficult written test, but also a second interview, that is, an interview.

Generally, they are people who do research in postdoctoral mobile stations or postdoctoral research centers. It should be noted that postdocs are not degrees, but doctoral degree recipients who are allowed to enter postdoctoral research stations to engage in scientific research. ?

In China, getting a doctorate is a necessary condition for becoming a postdoctoral fellow, but there are also some researchers abroad who do not have a doctorate, but they are postdoctoral fellows, so postdoctoral fellows have scientific research experience.