冷空气，又来了……

Core Points - A new cold air mass is affecting northern China, leading to significant temperature drops and snowfall in various regions [6][1] - The temperature in many northern areas is expected to reach new lows, with some places dropping below freezing for the first time this season [6][1] - Continuous snowfall is anticipated in the eastern part of the Tibetan Plateau, with heavy snow expected in Inner Mongolia and Heilongjiang [2][4] Summary by Sections Weather Impact - The cold air mass will cause temperatures to drop by 4°C to 6°C in northern regions, with some areas experiencing drops of over 8°C [6] - Cities like Changchun and Shenyang are expected to set new low temperatures since autumn began, with Taiyuan dropping to freezing and Xining below zero [6][1] Snowfall Forecast - Continuous snowfall is forecasted for the eastern Tibetan Plateau, with moderate to heavy snow expected in parts of Inner Mongolia and Heilongjiang [2][4] - Areas such as Qinghai and Gansu will see varying snowfall, with some regions experiencing blizzards [4][5] Agricultural and Transportation Concerns - The meteorological department warns of the impact of ongoing snowfall on agricultural facilities, livestock, and transportation safety in affected regions [5]