When does the count of nine start and end?

1, nine days from the beginning of the winter solstice solar term and ending at 998 1 day. On the solstice after beginning of winter, "counting nine", commonly known as "crossing nine", means entering the coldest season of the year. The so-called "number nine" means that from the date of the "winter solstice", nine days is a unit, which is called "nine". After nine "nines", it is exactly 8 1 day, which is called "nine". From "September 19th" to "September 9th", the cold winter turned into a warm spring.

2. The "99-99 Xiehan Song", commonly known as "99-99 Song", which is widely circulated among the people in winter from solstice to vernal equinox, vividly records the climate and phenological changes between winter solstice and vernal equinox, and also expresses some laws of agricultural activities.