What does this poem mean? "The overlord takes the two rivers alone, and the descendants drop hundreds of cities;" After the success of luxury, happiness is security and double danger. " ?

What does the landlord mean by the poem? The four seven-character poems quoted by the landlord are actually half of the first one in Wang Anshi's seven-character poem Four Stories of Jinling. The whole poem is as follows: Wang Song Anshi, Jinling nostalgia four, the first part, the overlord takes the two rivers alone, and his descendants have hundreds of cities. After the success of luxury, what is the double danger? Old seven or six Buddhist temples in Dongfu sing boat windows behind the court. Millet leaves the wheat show, and the ups and downs are close to the wine jar. "Four-character Poems of Jinling Nostalgia II" Mountain soldiers went south to this bridge river, and the enemy's fingers fell. The scenery is magnificent and empty, but it is difficult for King SHEN WOO to double it. Always look back at the sunset and imagine leaning against the window in the ruins. I only blame a reed, not the Han family. The Three Books of Jinling Nostalgia, located in Hedong, Wan Li, is lawless in the clouds. Soldiers haunt the heroes of the world, and saints leave the Central Plains. The landscape is lonely, and the wind and smoke are full of monks' windows. If the tomb is destroyed and the crown is empty, who will touch the tassel again? "Four Stories of Jinling Part IV" recalls that yesterday, when the soldiers went down to the Shu River, the generals laughed and the soldiers fought for surrender. Yellow flag for three hundred years, purple air empty double sword. New plants were born from the broken walls. Who knows the old porch window when the palace was abandoned? Don't scratch your head to find the inheritance, pour the white jade jar before. Writing background: Wang Anshi traveled to Jinling with his father in his early years; After Wang Yi's death, the whole family settled in Jinling for a long time. In his later years, he lived in seclusion at the foot of Zhongshan outside Jinling City. There are many poems praising Jinling in his collection, and Four Poems of Nostalgia for Jinling is a set of seven laws with the theme of the rise and fall of Jinling. Because the landlord only involves the first song here, I only understand one of them. The first song is the theme song of these four songs. The first two sentences of this poem are a summary of this theme. The first couplet reveals the historical phenomenon of the rise and fall of a country with Jinling as its capital from the beginning, while the second couplet points out the reason: most of the founding kings who won Jinling, the capital of Erjiang River, started from scratch and finally won the world, and their descendants often easily ruined their political power. Erjiang is the abbreviation of Jiangnan East Road and Jiangnan West Road in Song Dynasty, and it is also the main jurisdiction of Jinling countries and their capitals. These regimes have fallen down one after another, mainly because the successors have become more and more extravagant after enjoying the country. These two strategic alliances not only summarized Jinling, but also summarized almost all the laws of the rise and fall of political power in history. 342 couplets tell the story of the Southern Dynasties with rich imagination and nostalgic poetry, which proves with the first half of the Prime Minister's sentence that Dongfu City in Jinling City was once the residence of Sima Daozi, the prime minister of the Eastern Jin Dynasty and the dissolute king of Hui Ji, and now there are only a few Buddhist temples. When Du Mubo was on the Qinhuai River, she heard a businesswoman sing the posthumous work of flowers in the back garden of Yushu, Chen Houzhu, and she associated it with the sound of debauchery, which eventually made the late ruler a king of national subjugation. Du Mu wrote a poem, "A merchant girl doesn't know how to hate her country, but she still sings". Today, this ten-mile Qinhuai is still full of paintings, and I have not stopped singing. Finally, the poet said with emotion: The doctor of the Eastern Zhou Dynasty and the veteran of the Yin Dynasty, I am sorry for my old country and attached to the capital, so I wrote two songs, Su Zou and Mai Xiu. However, for thousands of years, people can't do anything about it, so let it die and pay in vain. The second song is a link between the preceding and the following, with the rise and fall of the Six Dynasties and Five Dynasties as the main line, turning to Song Taizu's efforts to pacify the Southern Tang Dynasty and unify the Central Plains. In the third song, we further thought that even if the situation in Jinling is dangerous and solid, there will be no more heroes alienating each other. The fourth song "Song" once again reviews the past, explores the reasons, and points out that those small countries that are divided into Jiangdong have entered a desperate situation because they do not repair their internal affairs. Judging from the meaning of the landlord's question, it seems to be the first four sentences used for divination. If so, I think that means nothing more than offering a fortune-telling Buddha with Wang Anshi's flowers. There is no general idea: "it is rare to start from scratch, and its descendants are often easy to destroy the regime." If you want money, power and business, you can understand what they mean.