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.