What are the characteristics of cold front weather in winter and spring in eastern China?

First of all, China is in the monsoon region, and the overall wind direction in China is northwest wind direction in winter and southwest wind direction in summer, which is one reason. Second, cold fronts mostly occur in late autumn, winter and early spring, because the direct point of the sun is in the southern hemisphere at this time, so the temperature in the northern hemisphere near the equator will be higher than that in the North Pole. As we all know, cold air is heavier than hot air, so cold air from Siberia will blow in southwest at this time, forcing hot air to retreat, because the hot air at this time will be weaker than when it was born. In China, it can be seen from the topographic map that from Inner Mongolia to Northeast China, both plateaus and mountains will hinder the cold front from advancing and force it to climb, so it is always Inner Mongolia, Xinjiang and Northeast China that the secondary line contacts the cold front weather. Son, the reason why Xinjiang is the first place to enter the cold front weather is because the mountains in Xinjiang are all northwest, so there will be relatively large vents between the mountains, and the cold front will enter China along these vents and go all the way south. Generally speaking, the trend of cold front weather is related to topography, climate and season. Cold wind weather mainly appears in winter. In winter, the strong Siberian low pressure and the Pacific high pressure form a pressure difference (mainly because the specific heat capacity of water and sand in the northwest desert is different from that in the southeast, the high-temperature air in the southeast coast rises, and the low-temperature gas in the northwest sinks to supplement it, thus forming a front at the intersection of cold and warm air currents).