Core Viewpoint - The article discusses the differences between the solar terms "Xiao Han" (Minor Cold) and "Da Han" (Major Cold), highlighting that despite their names, the actual temperature data often shows that Xiao Han is colder than Da Han in many regions of China [1][2]. Group 1: Temperature Comparison - Xiao Han marks the beginning of severe cold, while Da Han represents the accumulation of cold [1]. - Meteorological data indicates that during Xiao Han, average temperatures in Beijing range from -5 to -10 degrees Celsius, while Da Han is typically 1 to 2 degrees warmer [2]. - In the Yellow River basin, extreme low temperatures during Xiao Han can drop below -10 degrees Celsius [2]. Group 2: Climate Dynamics - The colder temperatures during Xiao Han are attributed to the strong cold air masses and the "lag effect" of ground heat loss [2]. - After the winter solstice, the ground continues to lose heat, leading to the lowest temperatures being recorded during Xiao Han [2]. - By Da Han, although cold air activity remains, the average temperature slightly increases due to longer daylight and increased solar radiation [2]. Group 3: Regional Variations - In northern China, the cold is characterized as "dry cold," with temperatures often dropping to -20 or -30 degrees Celsius [3]. - In southern China, the cold is described as "wet cold," with temperatures typically between 0 and 10 degrees Celsius during Xiao Han, but more frequent cold air activity during Da Han can lead to lower temperatures [3]. - The perception of cold varies regionally, with southern areas experiencing more discomfort due to humidity and precipitation during Da Han [3]. Group 4: Cultural Significance - Xiao Han symbolizes a period of hidden strength, while Da Han signifies a turning point towards the arrival of spring [3]. - Both terms reflect ancient Chinese sensitivity to seasonal changes and respect for nature [3].

Core Viewpoint - The article discusses the differences between the solar terms "Minor Cold" and "Major Cold," highlighting their climatic significance and cultural implications in Chinese tradition [2][3][4]. Group 1: Climatic Differences - Minor Cold is characterized by lower average temperatures, often ranging from -5 to -10 degrees Celsius in Beijing, while Major Cold is slightly warmer by 1 to 2 degrees Celsius [3]. - The phenomenon of "Minor Cold being colder than Major Cold" is attributed to the strong cold air and the lag effect of ground heat loss during Minor Cold, leading to extreme low temperatures [3]. - In the Yellow River region, extreme low temperatures during Minor Cold can often drop below -10 degrees Celsius, reinforcing the saying that "Minor Cold surpasses Major Cold" [3]. Group 2: Regional Variations - In northern China, the cold is described as "dry cold," with temperatures often dropping to -20 or -30 degrees Celsius, while in southern China, the cold is perceived as "wet cold," with temperatures typically between 0 and 10 degrees Celsius [4]. - Southern regions experience more frequent cold air activities during Major Cold, leading to a higher probability of temperatures dropping below 0 degrees Celsius compared to Minor Cold [4]. Group 3: Cultural Significance - Minor Cold symbolizes a period of hidden strength, while Major Cold represents a turning point towards the arrival of spring, reflecting the cyclical nature of seasons [4]. - The article emphasizes the importance of adapting to seasonal changes and maintaining warmth during the coldest times of the year, rather than merely comparing which term signifies greater coldness [4].