Has Xinglong returned to Nantian?

Returning to the south sky is a phenomenon of weather resurgence, which generally occurs in February and March in spring. The main reason is that after the cold air leaves, the warm and humid airflow quickly counterattacks, resulting in a rise in temperature and an increase in air humidity. Some cold objects are prone to produce water droplets when they encounter the warm and humid airflow. The phenomenon of returning to the south sky is more serious in the south, which is related to the fact that the south is close to the sea and the air is humid. When "Returning to the South Sky" appeared, the air humidity was close to saturation, and the walls and even the ground would be "bubbling with water". There were wet scenes everywhere, and the air seemed to be able to wring out water. The dense fog is the most distinctive appearance of "returning to the south sky". According to statistics, the visibility can be reduced to 5 meters when the phenomenon of returning to the south sky is serious. In the weather of returning to the south, some items or foods are easy to get wet, and then mildew and rot. Therefore, appropriate moisture-proof measures should be taken.