What is the saying of "Winter 99"?

In winter, the saying of Jiujiu is Jiujiu Song: 1929 Don't shoot; Walking on the ice in 3949; On May 9th, June 9th, I watched willows along the river, on July 9th, the river opened, on August 9th, Yanlai, on September 9th, plus nineteen, and plowed cattle everywhere.

A certain period in the traditional lunar year in China is also called "Sanjiu". There's a saying in China, "Practice dog days in summer, practice Sanjiu in winter". So it can be considered as corresponding to three volts.

1, counting nine cold days, that is, counting nine days every nine days from the winter solstice to eighty-one days, the weather will be warm for ninety days.

2. In ancient times, especially in northern China, the working people had poor conditions to keep warm from the cold, and the cold winter was regarded as a threat, which directly affected people's mood and even made them feel that winter was inexplicably long. At that time, in order to survive the long winter, the people of China invented the method of "counting nine" to pass the time, so as to alleviate the psychological crisis under the threat of winter.

3. Astronomical experts further introduced that Jiujiu Song, namely Jiujiu Cold Map, also known as Jiujiu Map, was widely circulated in China. There are various forms of "99 Map", such as Nine palace map, fish map, spring pattern map and sub-map. Therefore, during the winter solstice festival, China also has the custom of pasting the "Cold Map of 1999".