Why do pig casings only exist during the Chinese New Year?
Pig casings are only used during the Chinese New Year, partly because more pigs are killed during the Chinese New Year. According to relevant data, pigs are always killed in winter in rural areas, so this kind of natural casing appears, which is low in cost and more hygienic and healthy to eat. During the Chinese New Year, the quantity is large, but it is usually small, so it is not easy to buy it for other purposes.