Jiaozi, also known as jiaozi, is a traditional special food deeply loved by the people of China. It is a staple food for people in northern China, a local snack and a holiday food. There is a folk song called "Xiao Han, eat jiaozi in the New Year." Jiaozi often cooks with flour and leather bag stuffing. Jiaozi originated in the Southern and Northern Dynasties. Jiaozi mostly uses cold water and flour as agents, mixing flour and water, then rolling the fermented dough into coarse dough, and then cutting the dough into small round dough with a knife. Finally, roll the dough into a round skin with a slightly thicker middle and a slightly thinner periphery, wrap it with stuffing, knead it into a crescent or angular shape, wrap it and cook it in a pot until jiaozi comes to the surface. Dumpling skin can also be hot noodles, crispy noodles or rice noodles; The stuffing can be vegetarian, sweet and salty; Mature methods can also be steaming, roasting, frying, frying, etc. Meat stuffing includes three delicacies, shrimp, crab roe, sea cucumber, fish, chicken, pork, beef, mutton, chicken and so on. Vegetarian stuffing can be divided into mixed vegetarian stuffing and ordinary vegetarian stuffing. Jiaozi is characterized by its thin skin and tender stuffing, delicious taste and unique shape, which makes people have an appetite.

Jiaozi originated from the ancient trough. As early as the Three Kingdoms period, this kind of food was mentioned in the book Guangya written by Wei. According to textual research, it was developed from the "Crescent Wonton" from the Southern and Northern Dynasties to the Tang Dynasty and the "Double-horned Dried Meat" in the Southern Song Dynasty, with a history of 1400 years. According to the historical records of the Qing Dynasty: "On New Year's Day, when people are happy, they will get together and leave, such as eating flat food and taking the meaning of young friends." He also said: "Every year on the first day of the Lunar New Year, no matter rich or poor, white bread jiaozi is used, which is called cooking cakes, and it is the same all over the country. A rich family is hidden in gold and silver treasures. If it succeeds, those who provide food for their families will be lucky in the end. " This shows that people eat jiaozi in the Spring Festival, which means good luck, to show that they will bid farewell to the old and welcome the new. "Clear Money", edited by best friend Tsui Hark, said: "There is stuffing in it, or powder horn-both steamed and fried can be eaten, and the boiled soup is called jiaozi." For thousands of years, jiaozi, as a New Year's food, has been loved by people and spread to this day.

Jiaozi, formerly known as Joule, is said to have been first invented by Zhang Zhongjing, a medical saint in China. The story of his "Quhan Joule Decoction" has spread among the people to this day.

Zhang Zhongjing was born in Nanyang in the Eastern Han Dynasty. Since childhood, he has studied medical books hard and learned from others, becoming the founder of traditional Chinese medicine. Treatise on Febrile Diseases, written by him, is a masterpiece of doctors and is regarded as a classic by doctors in past dynasties. Zhang Zhongjing has a famous saying: "if you advance, you will survive;" If you retreat, you will save the people; " You can't be a good doctor and you can't be a good doctor. "Zhang Zhongjing not only has good medical skills, but also has noble medical ethics. He took the poor and the rich seriously and saved countless lives.

According to legend, when Zhang Zhongjing was the magistrate of Changsha, he often treated the people. One year, when the local plague was prevalent, he made a cauldron at the entrance of Yamen, giving up medicine to save people, which was deeply loved by Changsha people. After Zhang Zhongjing retired from Changsha, he just caught up with the winter solstice and walked to the shore of the Baihe River in his hometown. He saw that many poor people were hungry and cold, and their ears were frozen. It turned out that typhoid fever was prevalent at that time and many people died. He was very upset and determined to treat them. When Zhang Zhongjing came home, many people sought medical treatment. He is as busy as a bee, but he always remembers those poor people with frozen ears. He followed Changsha's example and told his disciples to build a medical shed and cauldron in an open space in Dongguan, Nanyang, and open it on the day of winter solstice to send medicine to the poor to treat their injuries.

Zhang Zhongjing's Quhan Joule Decoction is a summary of more than 300 years of clinical practice in Han Dynasty. Its practice is to put mutton, pepper and some cold-dispelling medicinal materials into a pot and cook them, then take them out and chop them up, make them into ear-shaped Joules with flour bags, put them into a pot and cook them and distribute them to patients seeking medicine. Everyone has two charming ears and a bowl of soup. After eating Quhan decoction, people feel feverish all over, their qi and blood are smooth, and their ears are warm. People eat from the solstice of winter to New Year's Eve, fighting typhoid fever and curing frozen ears.

Zhang Zhongjing didn't give up taking medicine until New Year's Eve. On the first day of New Year's Day, people celebrate the New Year and the recovery of rotten ears. They cook food for the New Year like burnt ears and eat it on the first morning. People call this kind of food "jiaozi", "jiaozi" or "flat food" and eat it on the solstice of winter and the first day of New Year to commemorate the day when Zhang Zhongjing opened the shed to deliver medicine and treat patients.

Zhang Zhongjing's history is nearly 1800 years ago, but his story of "Quhan Joule Decoction" has been widely circulated among the people. On the solstice of winter and the first day of New Year's Day, people eat jiaozi, and they still remember Zhang Zhongjing's kindness in their hearts. Today, we don't need charming ears to cure frozen ears, but jiaozi has become the most common and favorite food for people.