Fortress Besieged is Mr. Qian's only novel and a well-known classic of modern literature. Some critics think it is one of the greatest novels of modern China. Fortress Besieged is a poem in the novel, which is rich in connotation and wins over emotion with reason. The so-called "besieged city", as the characters in the book say, is born out of two European idioms. The Englishman said, "Marriage is like a golden birdcage. The birds outside the cage want to live in it, and the birds inside the cage want to fly out, so they get married and separate, and there is no game. " The French say that marriage is like a fortress, a besieged castle. People outside the city want to rush in, while people in the city want to escape. Fang Hung-chien, the hero of this book, didn't know about Fortress Besieged. However, when he heard people talk about Fortress Besieged and experienced the ups and downs afterwards, he thought that "everything in life has this idea." Fortress Besieged is an image summary of a life situation and a clever grasp of a psychological attitude. Fortress Besieged depicts the eternal cycle of human idealism and disillusionment. Throughout the ages, many people started from thinking that God helped them and ended up realizing that God helped them. The ups and downs in Fortress Besieged are all about rising ideals and repeated disillusionment. Often things are ruined when they are finished, and waves will only throw away their hard work. Many people have been in the situation of "besieged city" all their lives without paying attention to it. Therefore, Fortress Besieged can be regarded as a symbol of human predicament and repeated setbacks. Mr. Qian Zhongshu looks at floating life and thinks about diving; Point out the world, express deep feelings, and show metaphysics through physics, so that readers can suddenly understand life. The style of this book is humorous and wonderful, and you can appreciate the richness and beauty of Chinese characters when you read it.