Why is Xu Hun left out in the cold by revealing the story behind ＂Rain is coming, but the events cast their shadows before them＂？

　　You must have heard such a poem: "The rain is coming, and the wind is cast over the building". It is a famous poem, which is often used to describe the omen that things will change. But do you know who wrote this poem? Do you know what's the story behind this poem? Do you know why this poet has been repeatedly belittled?

　　This poem was written by Xu Hun, a poet in the Tang Dynasty. His name is Yong Hui and the word Zhong Hui. He is from Danyang, Jiangsu. He is one of the most famous poets in the late Tang Dynasty. He only writes regular poems, not ancient poems. He likes to write poems about nostalgia and pastoral. His poems are neat and obey the poetic law. There are often scenes of water and rain in his poems. Later, some people say that he is as powerful as Du Fu, and that "Xu Hun has a thousand wet poems, and Du Fu is worried all his life". He later moved to Dingmaojian in Zhenjiang, Jiangsu Province, and he used Dingmao as the name of his poetry collection, so people also called him "Jung-Moo Huh". Some of Xu Hun's poems were mistakenly received in Du Mu's poetry collection. "The East Building of Xianyang City" was written by Xu Hun in the autumn of the third year of Tang Xuanzong (849). At that time, he was supervising the empire, and he visited the ancient city of Xianyang near Chang 'an. The ancient city of Xianyang is in the northwest of Xi 'an, formerly called Chang 'an, where both Qin and Han Dynasties built their capitals. In the Sui Dynasty, the capital was moved to the place twenty miles away from the southeast, which was Chang 'an in the Tang Dynasty. The ancient city of Xianyang and Chang 'an face each other across the Weihe River. Xu Hun went to the west tower of Xianyang City, looked at the old haunt of Qin and Han Dynasties, and was deeply moved, so he wrote this poem. In the poem, "the rain is coming and the wind is full of buildings" means that it is going to rain on the mountain and the wind is blowing loudly in Xianyang Building. This is a metaphor for things to change and the atmosphere is very tense. Nowadays, people often use this sentence to describe the tense atmosphere before a conflict or war is about to happen. It is a famous sentence. The poet's first couplet said that he felt very sad when he climbed the high tower. "High city" refers to the west tower of Xianyang City, and "Jia Jian" means reed grass and "Ting Zhou", which is the place near the water or in the water.Here refers to the poet's hometown in Jiangnan. The poet left his hometown to be an official in Chang 'an. As soon as he saw reeds and willows in the distance, he remembered the scenery in the south of the Yangtze River. He is sad because he is homesick. "On the first day" means that he is sad at the sight, and "Wan Li" means that he is far away from his hometown. The word "sorrow" expresses the feelings of the whole poem. The scenery here is very bleak, and the poet's mood is also very heavy. He remembered his hometown because he saw the scenery, which was very sad and powerful.

　　The second couplet said that he looked at the distant scenery, which had profound implications: "Stream" refers to Panxi, and "Pavilion" refers to Cifu Temple. The poet himself explained: "The south is near Panxi, and the west is opposite to Cifu Temple Pavilion." In the evening, the poet boarded the tower and saw clouds on the Panxi River. It was getting dark, and the sun was about to set. The sun and the Cifu Temple Pavilion seemed to be next to each other. This couplet is often used to describe the tense atmosphere before major events, and it is a famous sentence that has been sung through the ages. The third link said that he looked at the nearby scenery, combining reality with reality: it was about to rain, birds hurried to the grass on the ground, and cicadas called on the yellow leaves in the palace in autumn. These were the real scenery in front of the poet. But the "Qin Yuan" and "Han Palace" that no longer exist remind people of the past-those luxurious palaces and gardens in the past are now barren and yellow; Only birds and cicadas, I don't know the change yet, just like before. History is changing, dynasties are changing, and things are changing. Finally, the conclusion is to integrate feelings into the scenery: "pedestrians" are passers-by. It refers to the wanderers and officials in ancient times and now, including the poet himself; "Old country" refers to Xianyang, the capital of Qin and Han Dynasties; "East" means that poets (not Wei Shui) come here from the east. Finally, the poet said with emotion: travelers should not ask what happened in the Qin and Han Dynasties before! I came to Xianyang, my old country this time, and I can't even find the old site. Only Weishui is still flowing as before.

　　"Rain is coming, the wind is full of buildings" is a famous sentence throughout the ages, which not only writes about the poet's homesickness, but also writes about the danger of the Tang Dynasty. It sets off natural scenery and historical sites, expressing the poet's nostalgia for the past and his anxiety about reality. It has profound implications and vivid images, and it is a poem with great artistic value. However, a great poet like Xu Hun did not get the respect and praise he deserved. His poems were mistakenly received in Du Mu's poetry collection, and his name was forgotten. Why is this? Perhaps it is because his poetic style is out of date, perhaps because his status is not prominent enough, or perhaps because his fate is not lucky enough. In any case, we should give him enough respect and appreciation when we read his poems today, so that his poems can continue to shine in the long history.