In short, it is normal to pay for reading literature, and the state cares about them in various forms. If you have a three-year academic system, you will pay three-year tuition. If you get a doctor, if you are a full-time doctor, you generally don't have to pay tuition.
Brief introduction of doctoral students
Doctoral students: Postgraduates studying for doctoral degrees, referred to as doctoral students, are the highest level of postgraduate degrees. In people's daily life, they are admitted to doctors, read doctors and so on. Refers to a doctoral student. Strictly speaking, a student who is studying without obtaining a doctorate can only be called a doctoral student who has obtained a doctorate, and is a real doctor.
Therefore, according to international practice, in formal occasions, only those who have obtained a doctorate can be crowned as doctors, and in informal occasions, such restrictions are not needed. China's higher education is divided into three academic levels: junior college, undergraduate and postgraduate, among which postgraduate is the highest, but postgraduate can be divided into master's degree and doctor's degree.
Doctoral students are the highest academic qualifications in higher education. When a doctoral student graduates, he can get a full-time doctoral diploma and a doctoral degree certificate. Those who study for a doctoral degree on the job with the same academic qualifications can only obtain a degree certificate, and their academic qualifications are still the same, such as undergraduate or master's degree.