Core Viewpoint - The article discusses the unusual warm weather in China during the "San Jiu" period, which is typically the coldest time of the year, and questions whether this warm trend will continue [1] Summary by Relevant Sections Temperature Trends - The "San Jiu" period marks the coldest time of the year in China, with historical data indicating an average national temperature of -5.15°C during this time from 1991 to 2020 [1] - This year, the overall temperature during the "San Jiu" period is expected to remain above average, indicating a warmer winter compared to historical norms [1] Regional Variations - There is a notable disparity in temperature across different regions; areas such as eastern Inner Mongolia and Northeast China have experienced temperature drops exceeding 10°C due to cold air influences, while regions from North China to Jiangnan are experiencing warmer conditions [1]