The Historical Development of jiaozi jiaozi was called "Jiao Er" in Song Dynasty, which was the etymology of the word "jiaozi" in later generations. This way of writing, in the following Yuan, Ming, Qing and Republic of China, we can still see that the Yuan Dynasty called jiaozi a "flat food". During the Wanli period of the Ming Dynasty, Shen Bang's Miscellaneous Notes of Wan Department recorded: "New Year's Day, New Year's greetings, making plaque food". Liu Ruoyu's "Deliberation in Records" states: "On the first day of the Lunar New Year, eating fruit snacks is also a plaque." The "plaque" of the "plaque food" in the Yuan and Ming Dynasties has now been commonly used as "flat". A "flat food" may come from Mongolian. According to Guangya, written by Zhang Yi, a Wei native of the Three Kingdoms, there was a crescent-shaped food called "wonton" at that time, which was basically similar to the shape of jiaozi now. By the time of the Northern and Southern Dynasties, wonton was "shaped like a crescent moon, and the world was full of food". It is speculated that when jiaozi was cooked, it was not fished out and eaten alone, but mixed with soup in a bowl, so people called jiaozi "wonton" at that time. This way of eating is still popular in some areas of China. For example, people in Henan and Shaanxi eat jiaozi, so they should put some small ingredients such as coriander, chopped green onion, shrimp skin and leek in the soup. About the Tang Dynasty, jiaozi had become almost the same as jiaozi now, and it was fished out and put on a plate to eat alone. Jiaozi was called "Jiao Er" in Song Dynasty, which was the etymology of the word "jiaozi" in later generations. This kind of writing can still be seen in the following Yuan, Ming, Qing and Republic of China. The Yuan Dynasty called jiaozi a "flat food". During the Wanli period of the Ming Dynasty, Shen Bang's Miscellaneous Notes of Wan Department recorded: "New Year's Day, New Year's greetings, making plaque food". Liu Ruoyu's "Deliberation in Records" states: "On the first day of the Lunar New Year, eating fruit snacks is also a plaque." The "plaque" of the "plaque food" in the Yuan and Ming Dynasties has now been commonly used as "flat". A "flat food" may come from Mongolian. During the Qing Dynasty, there appeared some new appellations about jiaozi, such as "Jiaozi", "Water Snack" and "Boiled Bean". The increase of jiaozi's name shows that its spreading area is expanding, and the custom of eating jiaozi during the Spring Festival has been quite popular in Ming and Qing Dynasties. Generally, jiaozi should be wrapped up before 30 12 o'clock and eaten at midnight. At this time, it is the beginning of the first day of the first lunar month. Eating jiaozi means "making friends at a younger age", and "zi" is homophonic with "dumplings", which means "happy reunion" and "good luck". There are many legends about eating jiaozi in the New Year. In addition, it is also said that eating jiaozi's folk language is related to Nu Wa's making people. When Nu Wa's soil caused people, the ears of the loess people were easily frozen off because of the cold weather. In order to make the ears not be fixed, Nu Wa put a small eye in the ear, tied it with a thin thread, and put the other end of the thread in the mouth of the loess people to bite it, so as to make the ears well. In order to commemorate the achievements of Nu Wa, ordinary people wrapped jiaozi, shaped it into an adult's ear with flour, wrapped it with stuffing (thread) and ate it with their mouths.