Continued next: The river opens in the seventh and ninth months, and the wild geese come in the eighth and ninth. Nine-nine plus one-nine, the plow oxen are everywhere.
From the Beijing version of Shujiuge: No action in 1929. 3949 Walking on the ice. 5969 Watching willows along the river. The river opens in seventy-nine years, and the wild geese come in eighty-nine years. Nine-nine plus one-nine, the plow oxen are everywhere.
Explanation:
There is a Chinese folk proverb that "the first nine days are warm, and the first nine days are cold." People find that if the first nine days are warm, the entire winter that follows will be extremely cold. Therefore, it is said that "First of all, don't be greedy for warmth. The continuous rain and snow will last until the end of winter." "The Records of the Years in Yanjing" says: "The ice becomes firm on the 39th day of the winter solstice." This means that from the 39th day of the winter solstice, it enters the coldest stage of the cold weather.
Later, people generally thought that the 39th day was the coldest, but in fact, the 49th day was the coldest period in winter. It's just that in the first few days after entering Sanjiu, the cold and warm changes greatly. When it gets cold, the body doesn't adapt well and it seems to be extremely cold. When it comes to Quanjiu, although the temperature is lower than that of Sanjiu, the temperature difference changes less, so it doesn't feel as good as that of Erjiu. It's so cold at 39 o'clock.
Since the winter solstice, March 49th has happened to be near the Great Cold of the 24th solar term.
Extended information:
The custom of counting nine:
The custom of "drawing nine" appeared in the Ming Dynasty. The so-called painting is actually a picture of calculating the date of spring after the winter solstice. In the Qing Dynasty, there was the "Nine-Nine Poems to Eliminate Colds", in which there are four sentences for each nine days, with a total of thirty-six sentences. The content ranges from the "Three Emperors Ruled the World" in ancient times to the "Qing Dynasty Sitting on the Golden Palace" in this dynasty, which is called It can be regarded as a historical "memorable event" full of elegance and interest.
After "drawing nine", the custom of "writing nine" appeared in the Qing Dynasty. "Writing Nine" also has a strong cultural flavor, often using the nine characters (traditional Chinese) of "The weeping willows in front of the pavilion cherish the spring breeze" or "The cypress breeze in the spring front yard brings fragrance to the room". (Similar to "drawing red" in calligraphy practice).
Use a thick brush to write in black, each word has nine strokes, and each stroke takes one day. It takes exactly eighty-one days to complete the nine words. What's interesting is that after filling in one stroke every day, you have to use a fine brush to write down the weather conditions on the strokes in white. Therefore, a line of "write nine" is also a more detailed meteorological data for the ninety-nine days.
Baidu Encyclopedia-Nine Numbers