What are the functions of regulating and maintaining folk customs?

Psychological adjustment, social coordination, cultural inheritance, entertainment and leisure.

1. Psychological adjustment: Folk activities can help people release their emotions, reduce their pressure, and enhance their sense of self-identity and group belonging, thus playing a role in psychological adjustment.

2. Social coordination: Folk activities help to coordinate social relations, enhance social cohesion and promote social harmony. For example, some folk activities need collective participation, which can enhance people's spirit of cooperation and sense of social responsibility.

3. Cultural inheritance: Folk activities are an important way of cultural inheritance. By participating in folk activities, people can understand and inherit their own cultural traditions and values, thus enhancing their cultural self-confidence and sense of belonging.

4. Entertainment and leisure: Folk activities can provide people with ways of entertainment and leisure, enrich people's spiritual life and improve their quality of life.