Core Viewpoint - The article discusses the recent weather changes in Chengdu, indicating the end of the coldest days of winter and the transition to warmer temperatures as the "Five Nine" period begins [1] Weather Conditions - The average national temperature during the recently concluded "Four Nine" period was lower than the same period in previous years, with northern regions experiencing more significant cold [1] - The "Five Nine" period is expected to be generally warmer, with Chengdu experiencing brief sunny weather before another cold front arrives [1] Upcoming Weather Forecast - From January 29 to 31, a medium-strength cold air mass will affect China, leading to a return of cloudy and rainy conditions in the Sichuan basin [1] - The weather forecast indicates that from January 26 to 28, the Sichuan basin will mainly experience cloudy to sunny weather, followed by a precipitation event from the evening of January 28 to January 31, with light rain expected in most areas and possible snow in higher elevations [1]

Group 1 - The core viewpoint of the article highlights that the cold weather during the "Four Nine" period will be significantly harsher than that of "Three Nine" [1] - A strong cold air mass is expected to impact most regions of China from January 17 to 21, with temperatures dropping by an average of 10°C [1] - In areas such as the Huai River basin and the middle and lower reaches of the Yangtze River, the cumulative temperature drop may exceed 20°C, leading to rapid freezing conditions in cities like Zhengzhou, Wuhan, Nanjing, and Hefei [1] Group 2 - The article notes that from January 19 to 20, there will be widespread rain and snow, causing a stark contrast in temperature perception from previously warm conditions to damp and cold [1] - The significant temperature drop and accompanying weather changes necessitate that individuals take precautions to stay warm [1]

Core Viewpoint - The article discusses the unusual weather patterns in China, highlighting a significant warming trend during the "San Jiu" period, which is typically the coldest time of the year, and anticipates a sharp temperature drop as the "Si Jiu" period approaches [1] Weather Analysis - A large-scale warming has been observed across China, with temperatures in many regions feeling more like spring than winter during the "San Jiu" period [1] - The winter front has reached southern China, with areas typically without winter transitioning from autumn to spring [1] - The warming trend is expected to continue for the next couple of days, with cities like Nanjing, Hefei, Wuhan, Hangzhou, and Changsha experiencing maximum temperatures exceeding 20°C, potentially breaking mid-January records [1] Upcoming Weather Changes - Starting from January 17, a strong cold air mass will impact most of China, leading to a general temperature drop of 10°C [1] - In the Huai River basin and the middle and lower reaches of the Yangtze River, the cumulative temperature drop may exceed 20°C, with cities like Zhengzhou, Wuhan, Nanjing, and Hefei facing rapid cooling [1] - Rain and snow are expected from January 19 to 20, causing a stark contrast in weather conditions from the previous warmth to a damp and cold environment [1]