What season is it in Leng Yue for nine days?

Nine days in first frost is winter in Leng Yue. "Nine-day frost in Leng Yue" refers to the weather phenomenon in winter. Generally speaking, this sentence means that the weather is very cold, the air humidity is relatively high, and the moisture in the air leads to the formation of frost. Leng Yue usually refers to the December of the lunar calendar, that is, 1 or February of the solar calendar. "Nine days" means that this cold weather lasts for nine days, which is also related to the nine-day Xuan Nv belief in ancient China. "Flying frost is white" describes a weather phenomenon, that is, due to the influence of low temperature and high humidity, water in the air will form frost, so it can be used as "flying frost for nine days in Leng Yue".