What solar terms are recorded in Nine Songs in the Yellow River Basin?

The climate and phenological changes between the winter solstice and the vernal equinox reflect some laws of agricultural activities.

Every year around February 22nd, 12 is the winter solstice. From that day on, most parts of China entered the cold season, and the count of nine began on the solstice of winter. From now on, every nine days is "September 19th". By the end of September 9th,1* * is 8 1 (plus 90 days after September 19th), which is called "nine consecutive days".

The meaning of every sentence in "Counting Nine Songs"

At this time, the weather has not really started to get cold, so you will feel cold when you put your hands outside and wear gloves.

By the third and fourth nine days, the temperature was already relatively low and the weather was coldest. Even the river is frozen, and the river is frozen, so you can walk on it. By the fifth, sixth and ninth hours, the temperature began to rise, and the willows sprouted and could be appreciated.

From the solstice of winter, the river thawed for sixty-three days, and on the seventy-second day, geese began to fly back from the south. From the solstice of winter, after 90 days, the geese have returned from the south, and farmers have begun to cultivate and sow.