The phenomenon expressed in nine songs

According to Chinese folklore, from the solstice in winter, it is "September 9th" every nine days until September 9th, and * * * 8 1 day in a year is a cold period. "Jiujiu", also known as "Winter Jiujiu", is a folk solar term in winter in China. "Counting Nine" starts from the end of June+February in 65438, which is the day after the "Winter Solstice".

As far as most parts of China are concerned, the weather was not the coldest when the 29th passed, but "1929, I can't reach it." /kloc-at the end of 0/949, it was almost a "severe cold" solar term, so it was said "3949, frozen bitch". After May 9, the earth gradually rejuvenated and the weather gradually warmed from cold, so "May 969, look at the willows by the river; 7989, walking alone. " By 1999, it was already a "thunder" solar term, so the thunder of 1999 made a lasting noise.

On the winter solstice, the days are short and the nights are long, and the longitude of the sun is 270 degrees. In ancient times, agricultural production was the mainstay, and because it was good at observing nature and related to weather and life, nine numbers were summed up to explain the weather changes. Eighty-one is the sum of nine nine numbers, which is the largest number. In the days when the ancients suffered from the cold winter. They think that in 8 1 days, spring is finally coming.