Has it started to get cold in September?
Beginning of autumn is the 13 solar term in 24 solar terms, the end of the last month of the dry calendar and the beginning of applying for the moon; The time is around the first day of July in the lunar calendar (between August 7 and 9 in the Gregorian calendar). "Autumn" means that summer is cool, which means the beginning of autumn. When we arrived in beginning of autumn, the phoenix tree began to shed its leaves, so there is an idiom "Autumn is known by falling leaves". Literally, the word "autumn" consists of two words: grain and fire, which means that the five grains are ripe. Autumn is the transitional season when the weather turns from hot to cold, and then from cold to cold. Beginning of autumn is the first solar term in autumn.
In the Song Dynasty, the plane trees planted in pots were to be moved into temples. When he arrived in beginning of autumn, Tai Shigong shouted, "Autumn is here." After the play, the phoenix tree dropped one or two leaves to express autumn.