What season does Dongfeng refer to in ancient poetry?

From the east wind, a hundred flowers blossom.

Spring is always waiting for the east wind.

In addition, the main climate types in China are temperate continental climate and subtropical monsoon climate. The ancient Han people lived in the Yangtze River and Yellow River basins with monsoon climate, and were influenced by the continental airflow at high latitudes in winter, mainly northerly winds. In summer, it is influenced by the low latitude ocean airflow, mainly southeast wind. Therefore, when the southeast wind blows, spring comes. It is said in ancient poems that the east wind is the spring breeze, which is also a common sense of life.