Why did you eat noodles on the seventh day? Is there any origin or source?

Why eating noodles on the seventh day of the first month is the "People's Day" in the traditional customs of China, that is, the "birthday of mankind". According to folklore, when Nu Wa made man, she made chickens, dogs, sheep, pigs, cows and horses six days ago, and made man on the seventh day. Therefore, the Han people think that the seventh day of the first month is "the birthday of mankind". The ancients believed that the sunny day on the seventh day of the first month meant longevity and world harmony. There is a saying in Dong Fangshuo's "The Challenge Book" in the Han Dynasty that "the seventh day, from Dan to dusk, the moonlight is bright, the stars are watched at night, the people are safe, and the monarch and ministers will meet". It can be seen that the theory of "people's day" has been circulated at least in the Han Dynasty.

Some areas in southern China still have the custom of "fishing for raw fish (similar to eating sashimi)", which means "the higher you catch, the higher you climb"; In the north of China, fried rice is mixed with maltose to make spherical or square food, which is called "ringing peace" and means "peace and well-being". Now people still have the custom of eating noodles every day, and this custom has been developed until the seventeenth and twenty-seventh of the first month. The meaning of eating noodles is "leggings". On the seventh day of the first month, children prick their legs, adults prick their legs and old people prick their legs. Praying for peace and health is still a wish.