Group 1 - The core viewpoint of the articles indicates that a significant temperature rise is observed in most parts of China, with temperatures exceeding 15°C in southern regions, but two cold air masses are expected to bring temperature drops starting today until the New Year holiday [2][3][7] - The temperature in the central and eastern regions has risen significantly, with increases of 4 to 10°C, and the 0°C line has moved northward to southeastern Inner Mongolia [2][3] - The highest temperature in Wuhan is expected to reach 17°C today, while the lowest will be only 2°C, indicating a substantial day-night temperature difference [2] Group 2 - The weather is expected to remain dry in most parts of the country today and tomorrow, with little rain or snow, but precipitation is forecasted to increase starting the day after tomorrow [3][5] - Snowfall is expected to develop in northeastern regions today, with small to moderate snow being the primary form of precipitation [3][4] - By the day after tomorrow, rain and snow will expand from the southwestern regions to parts of the northwest, Jianghan, and Huanghuai [5][7]

Group 1 - The core viewpoint of the article highlights a significant drop in temperatures across most of China's central and eastern regions due to cold air, with the northeast experiencing the most severe decline [1][2] - The temperature in the northeast is expected to fall below -10°C, with some areas in Jilin and Heilongjiang dropping to less than -15°C, and Harbin's temperature forecasted to reach -20°C [2] - The article emphasizes the need for the public to dress warmly to prevent health issues related to the drastic temperature drop, such as respiratory and cardiovascular diseases [2] Group 2 - Rain and snow in most northern regions are expected to cease, leading to clearer and drier weather patterns from tomorrow until the 30th [3][5] - Despite the cessation of snowfall, some areas still have significant snow accumulation, and the public is advised to be cautious of slippery conditions while traveling [5]

Temperature Trends - The overall temperature in China is expected to rise steadily until around the 19th, with significant increases of 4 to 8 degrees Celsius in the Northeast region [1] - On the 19th, the 20°C line will push north to southern Henan, while the 10°C line will be in southern Hebei, and the 0°C line will reach northern Heilongjiang, indicating a notable warming trend in the Northeast and Jiangnan regions [3] Regional Temperature Details - Hangzhou, Zhejiang is forecasted to reach a maximum temperature of 22°C on the 19th, which is approximately 11°C higher than the average for this time of year, which is 10.9°C [3] - Despite rising maximum temperatures, minimum temperatures are not expected to increase significantly, with areas in North China and Huanghuai remaining below 0°C, and regions in Northeast and Northwest China dropping below -10°C [5] Upcoming Weather Changes - A new wave of cold air is anticipated to move from north to south over the weekend, which will lead to a noticeable drop in temperatures across most of China [5]

Core Viewpoint - A significant warming trend is expected across most regions of China from December 17 to 19, with temperatures notably higher than usual, particularly in Northeast and Jiangnan areas, resembling conditions typical of late October. However, a cold front is anticipated to disrupt this warming trend after December 19, leading to a substantial drop in temperatures across central and eastern regions [1][2]. Summary by Sections Warming Trend - The warming trend will last for three days, with temperatures rising significantly across the country. The highest temperature line of 20°C is expected to move northward to southern Henan, while the 10°C line may reach southern Hebei. The most pronounced temperature increases are in Northeast and Jiangnan regions, with average highs exceeding 10°C and localized areas reaching around 12°C higher than normal [2]. Temperature Forecast - By the day after tomorrow, the Yangtze River middle and lower reaches will see maximum temperatures slightly above 20°C, with major cities like Hefei and Wuhan exceeding 20°C. However, this warming will be interrupted by a cold air mass, leading to a significant temperature drop back to normal or below normal levels starting December 21. For instance, Hefei's temperature is expected to drop from 21°C to single digits [2]. Weather Conditions - For the next three days, most of the country will experience clear and dry weather, with minimal precipitation. In the north, areas such as northern Xinjiang, northeastern Inner Mongolia, and Heilongjiang may see some snowfall, while the south will have rain mainly in Yunnan and along the southern coast [3].