If it is postponed, it will not exceed 6 years. Master students and doctoral students in China are divided into direct doctoral students and transfer doctoral students. Direct doctoral students generally need 5-6 years, and they can enjoy doctoral treatment directly after graduation. If it is postponed, it will not exceed 8 years. The academic system for doctoral students is usually 5-6 years, and they are admitted after graduation.

A master's degree can be transferred to a doctor in the second or third year, and he can enjoy the doctor's degree treatment in the next academic year. If it is postponed, it will not exceed 8 years. Compared with the previous academic system, the academic system of foreign doctors is much shorter than that of domestic doctors. The common academic system is three years, and some even two years.

American Doctoral System: Time: 3-8 years: To obtain a doctorate in the United States, most schools require 5 years, but it usually takes 7-8 years. Different majors and schools have different regulations. Most schools and majors can graduate in five years.

Domestic students apply for a master's degree in the United States for two years. I have to pass the doctor qualification examination in the middle. If students pass this qualification examination, they can only get a master's degree and complete their studies. Although American doctors finish their graduation four years ahead of schedule or postpone it to six years or even longer, it usually takes five years.

British doctoral system: time: 3-4 years system: British doctoral degree is tutorial system, with few class hours, mainly following the tutor to do research. Science students may spend about 2.5-3 years doing experiments and then writing papers.

The mid-term internship of engineering students will play a very important role in graduation thesis. If the internship is done well, they can also graduate early. For liberal arts students, the time is generally longer than that of science and engineering students. The requirement for graduation also emphasizes the autonomy, originality and creativity of research. There is no strict requirement on the number of papers published. You only need to complete your doctoral thesis and final thesis defense (generally 1-2 external audit plus 1 internal audit).

Doctoral system in Singapore: time: 2-5 years. Educational system: Singapore public doctoral system: Doctor of Philosophy (PhD):2-5 years, usually 4 years. Public doctors in Singapore only have research direction, and they are divided into departments according to bad things, without considering minor. The specific research direction will be chosen by students themselves or arranged by professors.