Dong guang Qiu se

August seventh. Dongguang County is located in the south of Hebei Province in North China Plain, downstream of Heilonggang River Basin and south of Cangzhou City. August 7th every year is the time when the east light enters autumn. Beginning of autumn is the13rd solar term among the 24 solar terms in the lunar calendar, and it is also the first solar term in autumn, which marks the official start of the Meng and autumn seasons: "Autumn" means that summer is cool. 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 "valley" and "fire", indicating the maturity of five grains. Autumn is the transitional season when the weather turns from hot to cold, and then from cold to cold.