Don't you need tuition for research?

You have to pay tuition.

It is inevitable to pay tuition fees for graduate studies, just like graduate students who take the national unified examination, they need to pay tuition fees to colleges and universities. However, according to the regulations of graduate students in colleges and universities, both graduate students and candidates for unified recruitment have scholarships, and the total amount of scholarships exceeds the tuition fee, that is, the tuition fee is offset in the first year of enrollment (but the tuition fee is actually paid).

It should be noted that the first-year scholarship is awarded according to the insurance research (all or proportion) and the unified examination (proportion), and the second-year and third-year scholarships are comprehensively evaluated according to the previous year's study and scientific research. Postgraduate scholarships in colleges and universities generally include national scholarships, school scholarships, school grants, or scholarships in the provinces where colleges and universities are located. The specific tuition and scholarship policies shall be subject to the college enrollment regulations.