Which winter is the coldest on the solstice? Who is the coldest solar term?

2. According to the meteorological data for many years, the slight cold is basically the lowest temperature in a year, and the temperature of the great cold is lower than that of the slight cold only in a few years. As soon as the winter solstice arrives, it enters the "Sanjiu", in which "Sanjiu" is the coldest time and always falls within the slight cold solar terms; There is also a saying among the people that "slight cold is better than severe cold"; For many places in China, the winter solstice has just begun to enter the cold season, and the temperature is not the lowest. The real cold is in the slight cold and severe cold period from winter to the future, which shows that the coldest solar term is in the slight cold.