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In the traditional culture of China, nine is the extreme number, which is the largest, largest and longest concept. Nine nines is eighty-one, which is the "maximum" number. People in ancient China believed that after the solstice on September 8 1 day, spring must have arrived.
There are many customs of "counting nine", among which "Jiujiu Song" is the most extensive and has a long history. These songs skillfully use the phenological phenomena in nature and vividly reflect the laws of weather changes during the Ninth Five-Year Plan period.
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." At the end of April 9, it was almost the "Great Cold" solar term, so we said "March 9, freezing cats and dogs". 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 "shock pad" solar term, so "the thunder of 1999 made a lasting noise."
The custom of "painting nine" appeared in the Ming Dynasty. The so-called painting is actually a picture that calculates the warm date of spring after the winter solstice. In the Ming Dynasty, "A Brief Introduction to the Scenery of the Imperial Capital" contained: "From winter to the sun, draw a plum flower, one in eighty petals. Dye one petal a day, and 99 petals will come out, then the spring will be deep, saying that 99 will eliminate the cold. "
In addition, there is a painting "Poems and Paintings for Eliminating Cold in 1999" in the Qing Dynasty, in which there are four sentences and thirty-six sentences every nine days, ranging from "Huang San ruled the world" in ancient times to "the golden years of the Qing Dynasty" in this dynasty, which can be called exquisite historical "memorabilia".
References:
Baidu encyclopedia-ninth place