The foods eaten for several days are: white radish, Chinese cabbage, white gourd, pumpkin, carrot, sweet potato, purple potato, spinach, chrysanthemum and so on. Counting nine means counting from the date of winter to Sunday (also called counting from winter to Sunday), 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".

Counting to nine is one of the popular customs in China. Counting nine means counting from the date of winter to Sunday (also called counting from winter to Sunday), 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".

Count to nine until the eighty-first day, when the peach blossoms open at nine o'clock. At this point, the cold has gone and the weather is getting warmer. Due to the vast territory of China, the climate varies greatly from place to place. Only parts of China, not all parts of the country, correspond to the winter solstice "9981, nine peach blossoms, deep spring and warm days", and some cold areas have no breath of spring.

The method of calculating cold and warm by number nine is suitable for areas where the temperature changes obviously from winter to around in China. The calculation of temperature and warmth changes is accurate to days. Judging from the number of days from winter to Sunday, the coldest periods are "March 9 and April 9", while counting to "998 1 day" is a warm day in late spring.