The autumnal equinox is the sixteenth solar term among the twenty-four solar terms and the fourth solar term in autumn. Fight refers to unitary; The sun reaches the yellow meridian180; Celebrated on September 22-24 of the Gregorian calendar every year. On the day of the autumnal equinox, the sun shines almost directly on the equator of the earth, and the length of day and night is equal all over the world? . The autumnal equinox means "equally divided" and "equally divided", which means equally dividing autumn except day and night. After the autumnal equinox, the position of direct sunlight moves south, and the days in the northern hemisphere become shorter, the nights become longer, the temperature difference between day and night increases, and the temperature drops day by day.

Autumnal equinox custom:

1. Eat autumn vegetables at the autumnal equinox: In Lingnan area, Hakkas have the custom of eating autumn vegetables. Autumn vegetable is a kind of wild amaranth, which villagers call autumn Artemisia. On the autumnal equinox, the whole village went to pick autumn vegetables. The preparation method is the same as that of spring soup, and the autumn soup is made of fish fillets. The jingle of the autumnal equinox becomes "autumn soup is dirty, the liver and intestines are washed, and the whole family is safe and healthy".

2. Sticking the bird's mouth: On the autumn equinox, Hakka farmers have a holiday according to the custom. Every family should eat dumplings. Every day, they should cook a dozen or twenty or thirty dumplings without wrapping them, and put them on the edge of the field with thin bamboo forks to stick the birds' mouths, so as not to damage crops.

3. Flying kites: The autumnal equinox is a good time for Hakka children to fly kites. Especially on the autumnal equinox, even adults attend. Kites are divided into Wang Zi kites, silver carp kites, moth kites, Leigong kites and Moonlight kites. The largest kites are two meters high and the smallest ones are two or three feet.

4. Send autumn cows: During the autumn equinox, people send autumn cows door to door. In fact, sending autumn cattle is to print the annual lunar solar terms on red paper or yellow paper, and also print the farmer's farming pattern, which is called "Autumn Cattle Map". The people who send pictures are folk singers, who mainly say that autumn ploughing is auspicious and not against the farming season. Every time they go to a house, they improvise what they see until the owner is happy to give money. Although the words spoken are casual, every sentence rhymes beautifully. Commonly known as "Autumn", Qiu Ren is called "Qiu Guan".