Summary of Key Points Core Viewpoint - The weather across China is transitioning, with northern regions experiencing a cessation of rain and snow, while southern areas continue to face persistent rain. A return to clear and dry weather is expected nationwide starting tomorrow until December 30 [1][2]. Weather Conditions - Northern regions will see a stop to rain and snow, while southern areas will experience increased rainfall, particularly along the Yangtze River and southward [2][3]. - Specific areas such as Xinjiang, Northeast China, and parts of Shandong are forecasted to have light to moderate snow or sleet, while southern regions like Guangxi and Hunan will see moderate to heavy rain [2][3]. Temperature Changes - A significant drop in temperatures is anticipated, especially in Northeast China, where temperatures may fall below -10°C, with some areas like Jilin and Heilongjiang experiencing highs below -15°C [4]. - The cold air mass has already caused noticeable temperature declines in central and eastern regions, with some areas reporting drops of over 6°C [4].

Core Points - A significant sandstorm event has affected northern China due to strong cold air and wind, with sand expected to continue moving southward to regions like Anhui and Jiangsu [1][2] - The sandstorm has resulted in wind gusts reaching up to 12-13 levels in some areas, breaking local observation records [1] - The Central Meteorological Observatory forecasts ongoing sand and dust weather in various regions, including parts of Jiangsu, Zhejiang, and Hubei [1][2] Weather Conditions - The recent sandstorm is attributed to active cold air and strong winds in northern China, with frequent sand source activity and dry weather conditions in the central and eastern regions [2] - A notable temperature drop has been observed across a wide area, with decreases of 6°C to 10°C in several regions, and local drops exceeding 12°C [2] - Further cold air and wind events are expected to impact northeastern and southern regions, with additional sand or dust weather possible in specific areas [2]