When did the custom of Spring Festival put up Spring Festival couplets and door gods?

Twenty-nine or thirty of the twelfth lunar month.

At the beginning of the new year, the first thing is to paste the door gods and couplets. On New Year's Eve (or 29th), every household goes to the streets to buy Spring Festival couplets, and those who are interested also spread paper and splash ink in the spring to decorate the portal.

Spring Festival couplets are also called door couplets, spring stickers, couplets, couplets and peach symbols. It depicts the background of the times and expresses good wishes with neat, dual, concise and exquisite words, which is a unique literary form in China.

The real popularity of Spring Festival couplets began in the Ming Dynasty, which was related to Zhu Yuanzhang's advocacy. According to Chen Shanggu's Miscellaneous Notes on Mao Yunlou in Qing Dynasty, one year when Zhu Yuanzhang was preparing for the New Year, he ordered every household to post a pair of Spring Festival couplets to celebrate.

Extended data:

Spring Festival couplets, also known as "Spring Signs", "Door Pairs" and "Couplets", are unique literary forms in China. They depict beautiful images and express good wishes with neat and concise words. This is an important symbol for China people to celebrate the Spring Festival. When people put couplets and blessings on their doorsteps, it means the official start of the Spring Festival.

Every Spring Festival, no matter in urban or rural areas, every household should take off beautiful red couplets and stick them on the doors to bid farewell to the old and welcome the new, thus increasing the festive atmosphere. Another source of Spring Festival couplets is spring stickers. The ancients posted the word "Yichun" more and more at the beginning of spring, and then it gradually developed into Spring Festival couplets, expressing the good wishes of the working people in China to ward off evil spirits and avoid disasters and welcome good luck. This custom originated in the Song Dynasty and was popular in the Ming Dynasty. ?