I've attended almost all of Gao Lian's classes. Suggestions: Ye Shengbiao of probability theory, Li Yongle of linear generation, Pan Xin of calculus or advanced mathematics. If you are not a high school student, it is recommended that Korea take the postgraduate entrance examination in mathematics.

One more thing, most of the review classes for postgraduate entrance examination are continuous classes, which are very heavy ... so is Gao Lian.

Korean flat class for half a day, rest+review for half a day, the time arrangement is more reasonable.

Which one to choose is up to you.