Summary of Key Points Core Viewpoint - The weather in Jilin Province is experiencing significant temperature fluctuations, with a warming trend expected to be followed by a strong cold front, leading to a "rise, fall, and then rise again" temperature pattern [1]. Group 1: Temperature Trends - During the "Four Nine" period, the average temperature in Jilin Province was -20.8℃, which is 5.4℃ lower than the historical average for the same period [1]. - The "Five Nine" period saw an average temperature of -16.8℃, also 2.7℃ below the historical average, marking one of the coldest phases of the winter [1]. - The average temperature during the "Six Nine" period (February 4 to 12) is expected to be -12.5℃, which, while still slightly below the historical average, shows improvement compared to the previous cold periods [1]. Group 2: Precipitation and Weather Conditions - The expected precipitation during this period is projected to be in line with historical averages, at about 1.0 millimeter, with slightly more in the eastern regions [2]. - A significant snowfall event is anticipated from the night of February 4 to February 5, particularly affecting the central and eastern mountainous areas [2]. Group 3: Public Advisory - Despite the arrival of "Lichun" (the beginning of spring), Jilin Province remains in winter, and the meteorological spring is still some time away [2]. - Public advisories emphasize the need for appropriate clothing adjustments due to the large temperature fluctuations and the importance of safety during travel [2].