What is the essential difference between Shanghai folk custom and common folk custom in Ren Yi's works?

China has a tradition of attaching importance to customs since ancient times. "To be a politician, you must first learn the customs" and "observe the customs and know the gains and losses" are the ancestral teachings adhered to by emperors in past dynasties. The supreme ruler should not only personally ask about the customs and people's feelings, but also appoint officials to inspect the customs and people's feelings as an important reference when formulating national policies, so that historians will go down in history and leave experience in managing customs for future generations.

Custom is a behavior pattern or norm that people in the past dynasties followed in a specific social and cultural field. The diversity of customs is that people often refer to the differences in behavior norms caused by different natural conditions as "wind"; The difference in behavior rules caused by social and cultural differences is called "vulgarity".

The so-called "different winds in a hundred miles, different customs in a thousand miles" precisely reflects the different characteristics of local customs. Custom is a social tradition. Some popular fashions, customs and inappropriate parts of the original customs will change with the changes of historical conditions. That's what the so-called "changing customs" means.

Custom is habit; Custom is an individual or collective tradition, inherited fashion, etiquette and habits. The events that form customs are quite large and common; Customs can be big or small, universal or special.

The former is the same as custom, while the latter can only use "custom" but not "custom": it is a custom for Cantonese to row dragon boats on the Dragon Boat Festival, and Cantonese say "I'll go first". That's a custom, not a custom.

The traditional festivals in China are various in form and rich in content. They are the formation process of a traditional festival with a long history and culture of the Chinese nation and the long-term accumulation and cohesion of a nation or country's history and culture. All these festivals listed below developed from ancient times. From these customs that have been passed down to this day, we can clearly see the wonderful picture of the ancient people's social life.

The origin and development of festivals is a process of gradual formation, subtle influence and gradual infiltration into social life. Like the development of society, it is the product of the development of human society to a certain stage. These festivals in ancient China were all related to the astronomy, calendar, mathematics and the solar terms divided later. This can be traced back to Zheng Xiao and Shangshu in Xia Dynasty at least in literature. By the Warring States period, the 24 solar terms in a year were basically complete, and later traditional festivals were also closely related to these solar terms.