What do you mean nine days?

"Count for nine days" means: it's very cold.

Source:

1, Mulberry Fall by Tang Qing, Liu Yuan: "How could I be sent for nine days? I screamed in the street, and I was afraid of my life. "

2. Zhou Libo's storm: "It has been good weather for nine consecutive days. It is neither windy nor too cold. "

Nine days to make sentences:

1, the winter solstice means entering the ninth weather, and the coldest weather is coming.

2. September weather, low temperature, blood vessels are easily contracted by cold stimulation. Therefore, this is the high incidence of cardiovascular disease.

3. The solstice in winter is as big as a year, and it is strong and good. It's nine days warm and twenty-four solar terms. On the solstice of winter, the sun rises and the ecliptic celebrates happiness.