Anyone who reaches his 66th birthday will eat jiaozi, and jiaozi is a gift from his daughter. It comes from the proverb "sixty-six pieces of meat have been lost, and this piece of meat has to be mended by children".

66-year-old jiaozi also has requirements: 6 two meats, 6 two loaves of bread, 68 jiaozi, of which 66 are 66 years old, and the other two are one in the sky and one in the ground. However, it is not a common practice to celebrate the 66th birthday in Wen Er. No matter what your birthday is, you should celebrate it on the sixth day of the first month.

Jiaozi evolved from wonton. In its long development process, there are many names, such as "prison pill", "flat food", "dumpling bait" and "powder horn" in ancient times. It was called "Crescent Wonton" in the Three Kingdoms period, "Wonton" in the Northern and Southern Dynasties, "Crescent Wonton" in the Tang Dynasty, "jiaozi" in the Song Dynasty and "Flat Food" in the Ming and Yuan Dynasties. The Qing Dynasty called it "Jiaozi".

Jiaozi originated in the Eastern Han Dynasty and was initiated by Zhang Zhongjing, a "medical sage" in Nanyang, Henan Province in the Eastern Han Dynasty. At that time, jiaozi was used as a medicine, and Zhang Zhongjing wrapped some cold-dispelling herbs in dough to treat diseases (mutton, pepper, etc. ) to avoid frostbite of patients' ears.