Core Viewpoint - The article discusses the impact of cold air and warm moist air on weather patterns in China, highlighting significant temperature fluctuations and heavy rainfall in southern regions over the next few days [1][2][6]. Weather Patterns - Cold air is affecting the middle and lower reaches of the Yangtze River and areas north, leading to strong winds and temperature drops [1][6]. - Southern regions are experiencing frequent heavy rainfall, with the rain intensity expected to weaken during the day but strengthen again at night [2][3]. Regional Weather Forecast - Areas such as southern Jiangxi, central and southern Fujian, northern Guangdong, and parts of Guangxi are experiencing heavy rain, with some regions facing torrential downpours [2][3]. - The Central Meteorological Observatory predicts snowfall or sleet in northeastern Inner Mongolia, northwestern Heilongjiang, and other regions, with some areas expecting heavy snow [3][4]. Temperature Changes - The temperature in the Huanghuai region and north is expected to drop by 4 to 6 degrees Celsius, with some areas experiencing drops of over 8 degrees Celsius [6]. - Fluctuations in temperature are anticipated across most of the country, with some areas seeing highs around 30 degrees Celsius before dropping to around 20 degrees [6]. Future Weather Outlook - A new round of rainfall is expected in Jiangnan and northern South China from April 26 to 27, with cumulative rainfall likely to exceed normal levels for this time of year [5]. - The public is advised to pay attention to weather forecasts and warnings, especially regarding strong convective weather and its impact on transportation [6].