add 9th class
add 9th class

leVirve/NTHU_Course,sonicyang/NCKU_Course,sonicyang/NCKU_Course,henryyang42/NTHU_Course,leVirve/NTHU_Course,sonicyang/NCKU_Course,leVirve/NTHU_Course,henryyang42/NTHU_Course,henryyang42/NTHU_Course,sonicyang/NCKU_Course,leVirve/NTHU_Course,henryyang42/NTHU_Course