What is the significance of studying folk customs?

Life is a folk custom, and folk custom refers not only to a material existence, but also to a psychological accumulation. For example, if you watch a TV series and perform the same thing with the same character, different writers and actors from Hong Kong, Macao and Taiwan and Chinese mainland will perform different roles and even use extremely similar or identical props, but as an individual, you still feel different. This includes your psychology and the other person's psychology, which are actually the products of folk custom nourishment. When we were growing up, no one would ever say to you, pay attention, this is a folk custom, you should, but you are always observing and simulating. For example, the posture of eating and the preference for food gradually developed into a memory and finally became an individual component in collective folk customs.