What do you mean by ants blowing up their nests?

It is a Chinese word that refers to the collective migration behavior of ants.

Some people think that this behavior of ants is related to rain, and that ants can predict the humidity of the air. When they feel too wet, they know it's going to rain, so they must move to a safer place. However, there is still no conclusive scientific evidence to prove this view.

It is also said that ants choose cloudy days or night activities, mainly to prevent the possible damage to ant eggs caused by sun exposure. Because people don't pay attention to the actions of ants at night, they can often see the activities of ants on cloudy days, so they associate ant activities with rain.