As the Sichuan saying goes: "Autumn is full of tears; What do you mean "cold"?

Generally speaking, after beginning of autumn, it is called "beginning of autumn". The so-called autumn means that this day happened in beginning of autumn, that is to say, beginning of autumn and Fufu were on the same day, and beginning of autumn was called autumn on Geng Day.

Because the last day of * * * has 10 days, that is to say, only 10 days after "Fu Bao Autumn" in beginning of autumn are dog days, and the hot summer time is short, so it is chilly. While Autumn Fu Bao stayed in beginning of autumn for more than 10 days, or even 189 days, it was naturally hot for a long time, so it was so hot that it cried.

Extended data:

According to the climate law of China lunar calendar, predecessors have long stipulated that "the third Geng day from long summer to the future is the first day, the fourth Geng day is the second day, and the first Geng day after beginning of autumn is the last day, with the first and last ten days and the second ten or twenty days", and the third day is * * * three or forty days.

Every year in beginning of autumn and the next two days, if there is Geng Day, it is ten days in the middle, otherwise it is twenty days. So in most years, there will be 20 days in the middle, and correspondingly, most years will be 40 days.

Autumn belongs to "Geng Xin Gold", so "ambush" should start from "Geng Day". The temperature is the highest, and it needs to be hidden for 20 days from summer to the future, so it starts from summer to the third "watch" in the future and ends on the second watch after beginning of autumn. If Geng Sunrise is now in beginning of autumn and two days later, it will be 30 days in dog days, otherwise it will be 40 days in dog days.

References:

Baidu Encyclopedia-Fu Bao in Autumn

References:

Baidu Encyclopedia-Sanfu