Why is Zhengzhou hot and cold recently? It is very cold these days. It's April.

The weather is related to the nature of the air over the area, which is called "air mass" in meteorology. Cold air mass means that when cold air passes through the border, the weather turns bad and the temperature drops, so it will feel cold. On the contrary, when the air mass is warm, that is, when warm air passes through the border, the weather gets better and the temperature rises, so it will feel hot. Because of the alternation of cold and warm air on the earth, cold air is mainly produced at the poles of the earth, and warm air is produced at the equator. The two interact and push each other on the surface, causing the weather to be cold and hot! The changeable weather this season is a normal climate problem!