The origin of this proverb is mainly Zhang Zhongjing's treatise on typhoid and miscellaneous diseases, which has been regarded as a classic by doctors in past dynasties. When he was in the Eastern Han Dynasty, he served as the prefect of Changsha. Later, for various reasons, he resigned and returned to his hometown to treat the villagers.
When he returned home, it happened to be winter, and he saw that the villagers on both sides of the river bank were malnourished, sallow and emaciated, hungry and cold, and many people had a lot of chilblains because of the cold weather, and even their ears were frozen.
As a doctor and mother, he hoped to do something for the villagers, so he asked his disciples to set up a cauldron in the greenhouse and cook a medicine called Quhan Jiaoer Decoction to treat the chilblain of the villagers.
The practice of Quhan Jiaoer Soup is to boil mutton and medicines for dispelling cold and treating chilblain in a big pot, then take out these mutton and medicinal materials and chop them up, make them look like ears with bread, then cook them, serve them out with a big bowl of broth just boiled, and it becomes this Joule Quhan Soup.
Later, some people imitated Jiao 'er's wrapping method and put on different fillings, which developed into the present jiaozi.
Such a bowl of soup can not only drive away cold and keep warm, but also has a wonderful taste. More importantly, it can also treat frostbitten ears. If these poor people at that time failed to eat such a bowl of "jiaozi soup", they would have frozen their ears.
Therefore, it has been handed down from generation to generation that the winter solstice is improper in jiaozi, and nobody cares if the bowl freezes off.
The custom of eating jiaozi on the winter solstice has been handed down slowly.