For a long time, the father-in-law entertained his son-in-law on the ninth day, which was his birthday celebration. On the tenth day, besides eating all day, there was a lot of food left, and the bride's family didn't have to spend any more money, so they used these leftovers to entertain their son-in-law and daughter. This folk song is called "Eleven Questions about the Son-in-law".

In fact, "son-in-law's Day" has a long history. In ancient times, the food left over from celebrating the birthday of "God" on the ninth day of the first month has not been eaten, so these foods sacrificed to God will be treated as gifts for the second daughter and son-in-law when she returns to China. On the eleventh day of the first month, the daughter and son-in-law rushed back to their parents' homes, and the elder brother or younger brother had to go out to meet them in advance to show respect and welcome to the daughter and husband.

Banquet for son-in-law:

As the saying goes, "Come and don't be rude", and the eleventh day of the first month is son-in-law day. According to the old tradition, parents-in-law will invite their son-in-law and daughter to have dinner at home as a thank-you gift for their daughter's son-in-law's second visit, and the elder brother or younger brother of her family needs to meet her in front of the door in advance to show her family's respect and attention to her son-in-law.

However, on this day, the ceremony of thanking the bride's family is quite special. She doesn't have to cook a table of delicious food, but uses the food to celebrate the birthday of "God" on the ninth day of the ninth lunar month, that is, the food dedicated to the Jade Emperor. On the eleventh day of the first month, the rest of the offerings were used to entertain the daughter and son-in-law.

Eating leftovers is not to look down on the son-in-law, but to celebrate the jade emperor's birthday. Not everyone is entitled to eat. "Feeding" is just for my family. Giving food to daughters and sons-in-law means not treating them as outsiders, but also means home and prosperity.