Which comes first, early autumn or beginning of autumn?

Autumn has begun. According to the weather forecast of official website, beginning of autumn is earlier than summer, and beginning of autumn is the first 13 solar term among the 24 solar terms, and festivals are held from August 7th to 9th in the Gregorian calendar every year. Being in summer is the fourteenth of the twenty-four solar terms. Dou Zhiwu (Southwest); Solar calendar 150 degrees; Celebrated every year from August 22nd to 24th in the Gregorian calendar. Summer, that is, "summer", means to leave in the heat, so autumn begins earlier than summer.