What are the phenological characteristics of the autumnal equinox?

What are the phenological characteristics of the autumnal equinox? There are three stages in the autumnal equinox: the first stage is when the thunder stops, the second stage is when the insect bites, and the third stage is when the water dries up. The ancients thought that it thundered because the yang was strong and the yin began to flourish after the autumnal equinox, so it stopped thundering.

Some insects unearthed at the vernal equinox will return to the soil after the autumnal equinox to prepare for winter. Water vapor is not so rich, it will start to dry up gradually, so the air is getting drier and drier. ?

Farming customs:

The characteristics of rapid cooling in autumn make "Sanqiu solar terms for health" particularly tense in the busy autumn harvest, autumn ploughing and autumn planting. The autumnal equinox is a good time to harvest cotton and tobacco leaves from green to yellow. Winter wheat has been planted in North China, and the Yangtze River basin and vast areas in the south are busy harvesting late rice and ploughing the land to prepare for rape sowing.

Vertical egg:

When the autumnal equinox comes, eggs are beautiful. In ancient legends, the day of the autumnal equinox is the easiest day to lay eggs. According to historical records, the tradition of dividing eggs in autumn originated in China 4000 years ago to celebrate the arrival of autumn. Oviposition reflects people's reverence and reverence for life and fertility.

Send autumn cattle:

People will send photos of autumn cows from door to door. The picture is printed on red paper or yellow paper with lunar solar terms all year round, and also printed with farmers' ploughing patterns, which is called "Autumn Cattle Map". The pictures are all folk singers, who mainly say things like good luck in autumn ploughing that do not violate the farming season. Every time they go to a house, they say whatever 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".