1. Cultural courses: such as calligraphy, painting, music, dance, literature, history, geography, etc.
2. Health courses: such as Tai Ji Chuan, Qigong, yoga, health care, etc.
3. Social activities: such as traveling, gathering, making friends, volunteering, etc.
4. Popular science courses: such as computers, foreign languages, science and technology, environmental protection, etc.
5. Other categories: such as legal knowledge, mental health and financial knowledge.