Beginning of autumn (autumn? Begins): One of the 24 solar terms in China lunar calendar, which falls on August 7th, 8th or 9th. In China, beginning of autumn is the beginning of autumn. ? On August 7th or 8th every year, beginning of autumn is considered as the time when the sun reaches 135. Twenty-four solar terms: "July Festival, set up a word to solve spring (beginning of spring). Autumn is also awkward, and this is the thing. " Beginning of autumn generally indicates that hot summer is coming and autumn is coming. After beginning of autumn, although the summer heat is hard to get rid of for a while, there is still the afterglow of "autumn tiger". beginning of autumn is also called beginning of autumn, but the general trend is that the weather is getting colder and colder. Due to the different climates in different parts of the country, the start time of autumn is also inconsistent. In climatology, autumn begins with the day when the daily average temperature drops steadily below 22℃ every five days. This division method is in line with the local reality, but it is quite different from the date of beginning of autumn in the middle and lower reaches of the Yellow River. After beginning of autumn, early rice harvest, late rice transplanting and autumn crops entered an important growth and development period in central China. Autumn means that summer is cool and autumn begins. The ancients regarded beginning of autumn as an important moment at the turn of summer and autumn, and always attached great importance to this solar term.