At that time, he will return to the memory of Ma Tiejin Ge. At that time, the poet's heroic spirit of looking north at the Central Plains and recovering lost land was like a mountain. How far-sighted! Did the poet ever think it would be so difficult to kill the enemy and serve the country? I thought that if I dedicated myself selflessly and served my country wholeheartedly, my country would be fulfilled by me. I didn't expect traitors to obstruct and destroy me and be deposed many times. At the beginning of the poem, the poet asked himself how depressed and angry he was. The phrase "shipbuilding" describes the battle between Song Bing and Jin Bing in the southeast and northwest, and it is also a summary of the poet's past travels. In the 31st year of Shaoxing, Song Gaozong (1 16 1), the gold owners invaded south with Yan Hongliang, Song Jun refused to defend in Guazhou, and then the nomads retreated. This is what the above sentence refers to. In the eighth year of Song Xiaozong Daoism (665438), the poet and Wang Yan actively planned to invade Chang 'an, crossed the Wei River and met Jin Bing at the third pass. This is what the following sentence refers to. The glorious past summarized in these two sentences is in sharp contrast with the vision of "intentional killing of thieves, inability to return to heaven" "I'm afraid I hate him in prosperity, and it's another big autumn." If I want to return to the Central Plains today, why is the poet's heart in tears? From the perspective of poetry, these two poems also show Lu You's great poetic talent. When "building a ship" is combined with the images of "night snow", "iron horse" and "autumn wind", it is two vast and magnificent battlefield scrolls. Image selection is very clean and typical. The poet used the phrase "stuck on the Great Wall" to express his ambition. In the Southern Dynasties, it was famous for Liu Song. However, what about now? The poet's unfulfilled ambition hangs in an empty talk. Ambition failed, struggle failed, everything failed, looking at myself in the mirror was the first spot to decline, and my head blossomed! Compared with the two, how sad is it? Think again, this ending is not caused by my disappointment, not by my failure to do my best, but by my mistakes and the world grinding me! I have a heart, but heaven won't. Sorrow is melancholy and anger. Look at couplets again. I also use code to clarify my ambition. Zhuge insisted on the Northern Expedition. Although he is "but before he could conquer, he was dead", he is famous all over the world. "After one thousand years, who can compare with him? Obviously, the poet's canon deliberately belittles the mediocre villain from the ruling and opposition parties, which indicates that his ambition to restore the Central Plains will also be "famous in the world". The poet can't find solace in reality, so he has to put the solace that his heart yearns for in the future, which is naturally helpless. And the poet had to pour out his anger in this helplessness. Through Zhuge Liang's allusions, the pursuit of the achievements of the sages shows that his patriotic passion remains unchanged and he is eager to emulate Zhuge Liang. Show your ambition. Looking back at the whole poem, we can see that every sentence is anger and every word is anger. If you regard anger as a poem, this poem is full of anger. The whole poem is full of gloomy feelings and strong charm, which is obviously due to Du Fu. The two couplets are steady, especially the lines of "Shipbuilding" and "Iron Horse", which are bold and heroic and widely read by people. Such poems are written by him.