Doctoral students usually study in school for 3-5 years.

Postdoctoral studies are actually just an experience after getting a doctorate. It is neither a degree nor a professional title, and there is no fixed limit to this period of time.

Under the current system, the academic qualifications are: technical secondary school, junior college, undergraduate course, master's degree and doctor's degree.

1, Master: After completing the undergraduate course, you can get a master's degree, you can study for 2-3 years, and you can graduate through thesis defense. You can usually get a "master's degree" after graduation.

2. Doctoral students: After studying for 3-5 years after master's degree, you need to publish a high-level thesis, and you can graduate by defending your doctoral thesis. You can usually get a "doctor's degree" after graduation.

3, postdoctoral: postdoctoral is easy to form a misunderstanding, that is, "postdoctoral is a doctoral degree or above"; The postdoctoral station is actually a mobile workstation.

Postdoctoral research refers to obtaining subsidies from relevant departments through competition before becoming a full-time researcher, engaging in research work in high-level research institutions and gaining scientific research experience.