Dou's courses this year are more relaxed, and the teachers are more humorous, but the courses depend entirely on consciousness. If you just want to be tall and don't plan to participate in the competition, I suggest going to Dou's class this year. Teacher Chen Weimin will be more demanding.
Moreover, it seems that Class C and Class A cannot be selected, and the course time is different.
Jin Yong's martial arts novels are quite good, so it's easy to choose courses.