Generally, jiaozi should be wrapped before 30 12 o'clock and eaten at midnight, which 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:
One is to commemorate Pangu's creation and end the mixed state;
The second is to take its homonym with "Hundun", which means "full of grain".
Extended data
On New Year's Eve, as soon as the clock strikes, we begin to eat jiaozi. Eat jiaozi just to get the meaning of "making friends at a younger age". This custom began in the early Ming Dynasty, and the original homonym of "Jiaozi" evolved into "jiaozi". Moreover, because the white-flour jiaozi is shaped like a silver ingot, a pot of pots on the table symbolizes the meaning of "making a fortune in the New Year, and the ingot rolls in".
Jiaozi on New Year's Eve is an important part of the festival, so many rules and established customs are also stipulated. These customs are all to meet the needs of the atmosphere of the New Year.