Doctors are divided into full-time doctors and part-time doctors.

Full-time doctoral students: Full-time doctoral students study doctoral courses in the form of full-time study. Students usually need to do scientific research in the research room or laboratory, and may also need to take a certain number of courses. Full-time doctoral programs usually last for 3-5 years, during which students can get state scholarships or grants, and have the opportunity to have in-depth cooperation with tutors and conduct in-depth research work.

Part-time doctoral students: Part-time doctoral students are a flexible form of doctoral study designed for people with special needs in work or other aspects. Students can study doctoral programs outside working hours, and the time is more flexible. Part-time doctoral students study for a long time, depending on their personal situation and progress. Such students may continue to work, and at the same time use their spare time to carry out research work. They need to take a certain number of study courses, complete research tasks and write papers.

At present, the scale of doctoral education in China is controlled, forming a ratio of 10: 1. In addition, in order to facilitate understanding, we can refer to the policy classification of full-set academic education in China: middle school students include junior high school students and high school students, college students include junior college students and undergraduates and graduate students, and graduate students include master students and doctoral students.

Doctoral students are referred to as doctoral students for short, and doctors in people's daily life refer to doctoral students. Doctoral students are the highest academic qualifications and degrees in China at present, and postdoctoral students are not students, but the names of staff. Although its name has the word doctor, it has nothing to do with students, but its essence is the identity of the staff.