At present, there are not many schools offering Korean postgraduate courses in China. I know Yanbian University, Peking University, Beijing Foreign Studies University, Jilin University, etc. are all difficult to take the exam.

See what direction you missed.

Yanbian pays more attention to grammar, Peking University pays more attention to history, and Jilin University and Beijing Foreign Studies University pay more attention to literature. Shanghai International Studies University also has postgraduate courses in Korean, so you can try it.