What is the solar term when the weather starts to get cold?

The solar term when the weather starts to cool is: beginning of winter. Beginning of winter is one of the 24 solar terms and one of the traditional festivals of the Han nationality. After beginning of winter, the sunshine time will continue to shorten, and the height of the sun will continue to decrease at noon. During the period of beginning of winter, the Han people regarded winter solstice as beginning of winter. In order to spend the severe winter, it is necessary to supplement the dietary customs. Li also means that winter begins. Winter means the end, which means that the crops should be harvested after harvest. China regards beginning of winter as the beginning of winter. Beginning of winter solar terms and high-altitude westerly jet have been fully established in South Asia. At this time, the fluctuation of the south branch of the high-altitude westerly wind and its eastward movement have great influence on the precipitation weather in Jianghuai area. When the zonal circulation in Asia and the fluctuation of the south branch of the westerly wind are strong, there will be a wide range of rainy weather. In addition, the zonal circulation will end, the meridional circulation will be established, and there will be a cold wave and significant cooling.