今日小寒

Group 1 - The article discusses the solar term "Xiaohan," which is the 23rd solar term in the 24 solar terms, indicating cold weather but not at its peak [1] - It highlights that during Xiaohan, the cold air accumulates, leading to freezing rivers and frozen soil, particularly in northern China [1] - The article mentions the saying "Xiaohan is colder than Dahan," suggesting that Xiaohan is often colder than the subsequent solar term, Dahan [1]