Why is Handan hot and cold? Why doesn't mantis come out when it's cold?

The different solar radiation received and the different heat obtained lead to the difference of temperature and air pressure, and the airflow movements cross each other, thus causing the weather in Handan to be cold and hot and afraid of cold. Cockroaches used to be tropical insects and are very afraid of cold. When the temperature drops below 0℃, their lives are seriously threatened, so mantis can't get out when the weather is cold.