Which solar term does the number nine start from?

Count to nine from the winter solstice.

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 comes and the weather is getting warmer and warmer. Nine-day weather is a solar term in China, and it is one of the popular customs in China. Counting nine means counting from the date of winter solstice (also known as counting from winter solstice), counting nine every nine days, and so on. As the saying goes, "it's hot in three days, cold in four or nine days", and the coldest period in a year is "three or nine days".