First, you have to graduate from high school. Then when applying to Korea University, he will look at your high school and college entrance examination results. The top three universities in South Korea have relatively high admission requirements. When entering school, it is definitely difficult to graduate from popular majors, and Korean students in South Korea are basically in the top few in high school, and their grades will be poor if they don't work hard. If you only want a diploma, you can choose those majors that are good for graduation. You should be careful if you want to get a job.