What are the origins and customs of the slight cold solar terms?

The slight cold solar term originally originated in the Yellow River Basin.

The slight cold solar term originally originated in the Yellow River Basin. It is said that in the early years, every farmer in the Yellow River valley used the "Nine-Nine Cold Map" to keep out the cold and keep fit. Count to nine, calligraphy is red, which can not only dispel the cold, but also be a good way to keep in good health in winter. As the saying goes, "A little cold wanderer will miss home, and a big cold will reunite at the end of the year." After the slight cold solar term, the day of returning home is getting closer and closer.