As for "Counting Nine", there is a folk song that goes like this: "Don't do it in September, walk on the ice in March and April, watch the willows along the river in May and June, open the river in July and September, geese come in August and September, and cows go everywhere in September and September."

The solstice in winter is called "over nine" or "counting nine", that is, from the solstice in winter, every nine days is a "nine", and * * * is divided into nine "nine". After counting the last nine, spring will come.

The solstice in winter is the shortest day in a year. After the winter solstice, the direct point of the sun gradually moves northward, and the days in the northern hemisphere gradually lengthen and the nights gradually shorten. Therefore, there is a saying that "eating the winter solstice makes the day longer."

Climatically, during the winter solstice, the average temperature in the northwest plateau is generally below 0℃, and the southern region is only about 6℃ to 8℃. In addition, the winter solstice begins to count to nine, and the winter solstice becomes the first day to count to nine.