What is the name of Huinan Day in Chongqing?

Returning to the southern sky is a phenomenon of warmer weather, mainly because after the cold air leaves, the warm and humid airflow quickly counterattacks, resulting in an increase in temperature and air humidity. Some cold objects are easy to produce water droplets when they encounter warm and humid airflow. The tropic of cancer in the south is more serious, which is related to the sea and humid air in the south.