Early autumn means beginning of autumn time is in the morning, and late autumn means beginning of autumn time is in the afternoon. There is summer fire in early autumn, which is warm and dry at this time, and some places are even hotter than summer; Late autumn is near winter, and the cold is gradually pressing. At this time, the moisture in the air will also decrease, mostly cold and dry. Beginning of autumn is the first 13 of the 24 solar terms, mostly at the turn of June and July in the lunar calendar. "Early autumn and late autumn" means that autumn begins before or after the sun comes out.