In ancient my country, the Beginning of Autumn was divided into three periods: "The first period is when the cool breeze arrives; the second period is when the white dew grows; the third period is when the cicadas chirp."
The cool breeze arrives: when the wind blows, people will It feels cool. The wind at this time is different from the hot wind in summer.
White dew falls: There will be fog on the earth in the morning.
Cicadas chirp: The cicadas that feel the gloom in autumn also begin to chirp.