2. Academic groups. Such associations can be divided into two categories, one is scientific and technological innovation, such as robots, AI, algorithms, etc., and the other is professional learning, which is often established by various departments and corresponds to different majors, such as history society, literature society, chemistry society, law society, etc.
3. Cultural and sports associations. The most common types of clubs are drama, cross talk, opera, band, debate, poetry and so on. And sports often include all kinds of ball games, as well as mountaineering, cycling, skiing, martial arts, archery and so on.
4. Voluntary service organizations. Some are pan-voluntary services, and some are specifically aimed at a certain group or project, such as sign language clubs and teaching clubs.