There is "like a strong wind in spring, which blows at night and blows open the petals of ten thousand pear trees". What kind of weather is it used to describe?

In the 5,000-year history and civilization of China, there is a very excellent and splendid poetry culture. China is a country of poetry, song and fu. For thousands of years, our ancestors left countless brilliant poems, which are the artistic treasures of the Chinese nation and fertile soil for cultivating national spirit.

Countless revolutionary martyrs and people with lofty ideals have grown up on this fertile soil. Today, we learn ancient poetry, which is of great benefit to children, young people and the elderly. I remember when I was very young, I was in primary school. I came across such a poem: "A spring breeze comes one night, and a thousand trees grow in bloom". But I remember that primary school Chinese textbooks are extracurricular reading. That's the whole poem. So at that time, like everyone else, I saw the word "Spring Breeze" in it and thought it was a poem about spring without hesitation.

I know that I have learned the whole text in Chinese class in senior high school. After the explanation of the Chinese teacher, it turns out that the scene described in this poem is "After the snow falls on the branches, after the spring breeze blows, the pear blossoms are like brocade". Together with the general idea of the poems before and after, I know that this is a scene describing the snow in winter.

But then I found out that this poem was not written by the author in winter. Let's look at the whole poem. This is Cen Can's "Send Judge Wu back to Beijing": the north wind blows white grass, and it snows in August. Suddenly, like the spring breeze overnight, thousands of pear trees are in full bloom. The curtains are wet, the wool is not warm, and the quilt is very thin. The general's horn bow is out of control. It's hard to protect his iron clothes. On the vast sea, hundreds of feet of ice dried up and thousands of miles of mist condensed. China's army put wine and drank, and returned home with the Huqin Pipa and Qiangdi. At dusk, under heavy snow, the red flag was frozen by the wind. The east gate of Luntai will take you there. It's snowing. I can't see you on the mountain road. There is a place to ride horses.

In fact, as early as the first two sentences of this poem, Hu Tian's August is "August in the snow". This shows that the author wrote this poem in August of ancient times. As we all know, the ancients used the lunar calendar. Generally speaking, August refers to the beginning of October in the Gregorian calendar, that is to say, our seasons are almost the same now. Du Fu also mentioned "autumn wind whistling in August", which shows that ancient August really refers to autumn. The location here is on the wheel platform, and it should be the northwest area now. It is normal to snow.