The beautiful moral of beginning of autumn is: It symbolizes that everything begins to mature from luxuriance, and the yang gradually closes and the yin gradually grows.

Beginning of autumn is the thirteenth of the twenty-four solar terms, and it is the beginning of autumn. The bucket refers to the southwest, and the sun reaches the longitude of 135, and it is celebrated on August 7 or 8 of the Gregorian calendar every year. "Reason" means the beginning; "Autumn" means that the grain is ripe. The change of the whole nature is a step-by-step process, and beginning of autumn is a turning point in which the Yang gradually closes, the Yin gradually grows, and the Yang gradually gets cloudy. In nature, everything begins to mature from luxuriance.

Beginning of autumn is the third hot solar term among the 24 solar terms, second only to Daxia and Xiaoxia. According to the order of solar terms, beginning of autumn is followed by summer, and autumn is the second solar term "Summer comes" (the last summer). Twenty-four solar terms include "three summers" (little summer, big summer and midsummer), and there is a "beginning of autumn" solar term in the middle of the "three summers", followed by summer (last summer) after beginning of autumn. "Three Summers" and "Dog Days" both represent hot and humid weather, and "Dog Days" involve four solar terms: Little Summer, Big Summer, beginning of autumn and Early Summer.

Beginning of autumn means precipitation, humidity, etc. It is at the turning point of the year and tends to decrease or decline. Since beginning of autumn, the sun be the spirit gradually closed, and everything was restrained. Beginning of autumn, beginning of spring, long summer and beginning of winter, also known as the "Four Estates", are also one of the "Four Seasons and Eight Festivals" in ancient times. Autumn is the season of grain ripening and harvest. At the beginning of autumn, there was a custom of offering sacrifices to the land gods and celebrating the harvest in ancient times. There are also customs such as "pasting autumn fertilizer" and "biting autumn".