1929 What do you mean, you can't walk on the ice?

"1929 not shooting, walking on the ice in 3949" means that the weather is too cold to take out your hands. In 3949, it meant that at the coldest time of the year, lakes and rivers were frozen and people could stand and walk on them. It is a folk song "Nine Jiu Ge". The so-called number nine is the way to calculate the date of cold weather and spring. From the winter solstice, the first nine days are 19, the second nine days are 29, and so on until "99". When the ninth nine days are over, it means that spring has arrived.

Jiujiu Song, also known as Jiujiu and Jiujiu Winter, is a folk solar term in winter in China. The "number nine" began the day after the "winter solstice" in late February and early February of 65438. When the custom of "counting nine" originated, there is no exact information at present. However, it was popular at least in the Northern and Southern Dynasties.

"Liang Chao Shu Jing Chu Chun Qiu" records: "The winter solstice is 998 1 day, which is the end of cold." Count nine cold days, that is, from the solstice of winter, count a "nine" every nine days until the "99" of 81 days, and the weather will warm up.

"99 songs" is also the multiplication formula we use now. There are two kinds of multiplication formulas used in China now. One is 45 sentences, usually called "Xiao 99"; There is also a sentence 8 1, which is usually called "Big Uncle Nine".