What is folk custom? What are the four characteristics of folk customs?

Folk custom is a kind of folk custom, which is created by people and passed down by people. It inherits the phenomena (including thoughts and behaviors) learned from generation to generation. It is a civil society life culture created and passed down by the middle and lower classes, and it is the foundation and important part of traditional culture. Folklore has four characteristics: sociality and collectivity, type and pattern, stability and variability, inheritance and communication.