How often do you start counting nine times?

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".

There are many folk songs about the number nine, but the most popular one is: "1929, don't shoot; 3949, walking on the ice; In 5969, look at the willows by the river; Seven or nine rivers open; Eighty-nine geese are coming; 99 plus 19, plowing cattle everywhere.

Nine cold days are the coldest period in China. It is recorded in the Record of Jingchu Age written by Zonggu in Liang Dynasty: "The number of days from winter to day, 998 1 day is the end of cold." People think that the cold weather in this period is a miscellaneous solar term besides the twenty-four solar terms.

"Dog days" is the general name of the first, middle and last three days, and it is the hottest season in a year. It appears from mid-July to mid-August in the solar calendar every year. Its climate is characterized by high temperature, low pressure, high humidity and low wind speed. "V" means being forced to hide underground. According to the climate law of the lunar calendar in China, predecessors have long stipulated that "the third Geng day after long summer begins with the first day, the fourth Geng day begins with the second day, and the first Geng day after beginning of autumn ends with the third day, with the first ten days, the middle ten days, the twentieth day, and the third forty days. Every year in beginning of autumn and the next two days, if there is Geng Day, it is ten days in the middle, otherwise it is twenty days. So in most years, there will be 20 days in the middle, and correspondingly, most years will be 40 days.