What's the name of returning to Nantian?

A southerly wind or a wet day. The reason why Hui Nan Tian is also called southerly day or humid day. The return to the southern sky mainly occurs under the special environmental conditions that the lower atmosphere is controlled by the warm and humid southerly airflow from the South China Sea and moves northward. When the cold and warm air forces are equal and a quasi-static front is formed in South China, there will be continuous rainy weather. Because this weather phenomenon is closely related to the warm and humid airflow in the south, it is also called southerly day. When Returning to the South Sky appeared, the air humidity was close to saturation, and there were wet scenes everywhere. The walls and even the ground will be flooded, and the dense fog is the most distinctive appearance of returning to Nantian. This wet weather phenomenon is easy to cause water droplets on the surface of some objects to condense, giving people a feeling of resurgence, so it is also called resurgence day.