Why is the cold wave distributed in vast areas except the Qinghai-Tibet Plateau?

This sentence is inaccurate. Cold wave refers to the cold air coming from polar regions or cold zones in winter half a year, which invades the middle and low latitudes on a large scale like tides. Cold wave is a kind of disastrous weather in winter, and people are used to calling it cold wave. Cold wave gale is windy weather caused by cold wave weather. The average gale days affected by cold wave and gale in most parts of China are about 20 ~ 70 days, northwest, north China, northeast, Qinghai-Tibet Plateau 10 ~ 75 days, southwest, south China and Yangtze River basin 3 ~ 25 days.

There are three high-frequency windy days in China affected by the cold wave. The first is the Qinghai-Tibet Plateau, which is the largest windy weather-prone area in China, with annual windy days reaching 75 ~ 100 days and above. It often causes gale disasters in snowy plateau and affects animal husbandry production. Second, northern Inner Mongolia and northwestern Xinjiang are the only way for the cold wave to invade. Especially in the northern part of Inner Mongolia, the terrain is flat, the cold wave and strong wind are unimpeded, and the number of strong wind days is as high as 50 ~ 80 days, which leads to serious sandstorms and wind erosion and desertification in this area, which has a great impact on agricultural and animal husbandry production. The third high-frequency windy area is Songliao Plain in Northeast China, and the number of windy days is about 25 ~ 50 days. This area is an area where the development of northeast cyclones is strengthened. There are Daxing 'anling and Inner Mongolia Plateau in the west and Xiaoxing 'anling and Changbai Mountain in the east. The narrow tube effect of large terrain enhances the wind force.