What does the sentence "beginning of autumn is the end of summer today" mean? ?

Today, we welcome the first solar term in autumn, beginning of autumn. Beginning of autumn is the thirteenth of the 24 solar terms. "Autumn" means that summer is cool and crops are about to mature. Beginning of autumn is the beginning of autumn. Autumn is crisp, the moon is bright and the wind is clear. Autumn is the transitional season when the weather turns from warm to cool. As the saying goes, "an autumn rain leads to a cold."