小寒节气预警大数据报告：“三九”前后，冷空气活动频繁

Core Viewpoint - The article highlights the onset of the "Minor Cold" solar term in China, marking the beginning of the coldest period of the year, characterized by frequent cold air activities and significant temperature drops [1] Group 1 - The "Minor Cold" is the fifth solar term of winter, occurring around the "Three Nines" period, indicating the coldest time of the year [1] - During this period, northern regions experience severe cold with freezing temperatures, while southern regions face frost and intense cold [1]