Why does the wind direction change back and forth in different seasons?

Most areas belong to monsoon climate. Southeast wind blows more in summer and northwest wind blows more in winter. Spring and autumn are seasons with alternating monsoons, so the wind direction is also alternating. Generally speaking, when the southeast wind blows, the temperature rises, the air humidity increases and there are more rainy days. When the northwest wind blows, the temperature drops, the air is dry, the humidity is low, and there are few rainy days. In addition, the areas where the summer monsoon (southeast wind) meets the winter monsoon (northwest wind) often have heavy precipitation, and it also changes according to the changes in different seasons, because the temperatures in different places are different in different seasons. The south wind blows in spring, indicating that the weather is getting warmer, which is a tropical hot airflow from the equator; The north wind blows in autumn, which means it is cold. This is cold air from the North Pole.