What poems in this ancient poem can reflect and evaluate the great influence of canal construction?

Bianhe nostalgia

Thousands of Cai Chuanjun were driven in the middle of Cui and on both sides of the canal, but the motorcade did not return to Yangzhou.

It should be God who taught people to open the Bianhe River. There is not a mountain on the ground for a thousand miles.

It is said that the Sui Dynasty perished because of this river, but now it is still flowing, and the north and south ships are unimpeded.

If there were no water temple dragon boat, wouldn't there be more theories about * * *?

translate

First of all, countless dragon boats sail among the green willows. After these ships were transported to Yangzhou, none of them returned to Chang 'an. There are no mountains for more than 1000 miles here, which should be used to dig edge water.

Secondly, it is said that the Sui Dynasty perished because of this river, which is still flowing. If it weren't for the dragon boat repair at that time, his achievements could probably be compared with Yu's.

Comments: The first poem describes the geographical environment of Yang Di's luxury fleet and the Grand Canal, implying the historical fact that Yang Di was killed by Yu Wenhuaji. The first sentence of the second song begins with the statement that Sui died in the Grand Canal, but it is refuted by the antonym of the second sentence. The poem says: Many people who study the reasons for the demise of the Sui Dynasty blame the canal and regard it as a great curse. However, the excavation of the Grand Canal has significantly improved the north-south traffic, which is of great benefit to economic ties and political unity and has a far-reaching historical role. Use the word "so far" to express how long it has benefited future generations; Say "a thousand miles" and look at the vast areas that benefit from it; The word "lai" shows that the national economy and people's livelihood are indispensable and even more admirable. This sentence emphasizes the century-old benefits of the Grand Canal, which is refreshing. This is the "reverse order method" commonly used by Tang people to praise history and cherish ancient poems. The law of cassation can make the argument novel, but it is not easy to make the argument reasonable. Of course, the Grand Canal is beneficial to future generations, and Pi Rixiu looks at it from two different angles. When the canal was completed, Yang Di led 200,000 people to travel, riding a four-story "dragon boat", and nine three-story "water temples", called floating scenery, in addition to many miscellaneous boats. The captain is more than 300 miles, and there are nearly 10,000 people holding big ships, all dressed in colorful clothes, and the land and water are bright. The so-called "the spring breeze cuts the palace brocade all over the country, which is half an obstacle and half a sail" (Li Shangyin's Sui Palace), and its extravagance and waste are really unheard of in history. The third sentence "Water Temple Dragon Boat" refers to this. The author's criticism of Emperor Yang Di is very obvious. However, he didn't say it directly. The fourth sentence suddenly quotes Dayu's achievements in water control, and even emphasizes with rhetorical questions: "* * * Yu's contribution is not much?" That is to say, in terms of merit, didn't Yang-ti talk more about water control than Dayu? This is simply absurd, but because the poet's comments, as far as water conservancy projects benefit future generations, are based on the premise of "Dragon Boat Temple without water", it is indeed comparable. But the assumption that "if there is no so-called cloud" does not exist in fact. After all, Emperor Yang-ti, who exhausted the luxury of "Dragon Boat in the Water Temple", is not as good as Dayu, who devoted himself to water control and "failed to enter every house", and will be immortal. Therefore, although the author used the method of reversing the case, he actually cleared the false "charges" for the Grand Canal, but the charges of Emperor Yang were more practical. This juxtaposition of the tyrannical and heartless bad king in history and the legendary venerable saint is a way to seize the past. Besides, Yu Yang-ti didn't make much contribution. "It seems to be the biggest compliment, but it is completely deprived by the restriction of' Dragon Boat Festival'." * * * Yu Lun Gong "was raised, and" Shao Duo "was raised again, and it was held high, with a heavy weight on the" Water Temple Dragon Boat Incident ",which made the criticism of Yang-ti more severe and the condemnation more intense. The use of this technique is better than the general positive expression. The era in which the author lived, political corruption, has embarked on the old road of the Sui Dynasty. Most people think that the lesson of history is dull, but it is meaningful for the author to review this lesson intentionally. This poem is mainly about discussion, which is slightly inferior to Li Shangyin's Sui Palace in terms of image thinking and rhyme. However, it is unique in its novel conception, incisive exposition and clever use of "reversing the verdict", and it is still a masterpiece in the late Tang Dynasty.