Fortress Besieged was a short story by Qian Zhongshu, which mainly narrated the love story between Fang Hongjian and Sun Roujia. The last sentence was: He seemed to have deep feelings for her, but he knew that he could not give her the life she wanted, so he could only bury this feeling deep in his heart. These words expressed the contradictions and struggles in Fang Hongjian's heart. He loved Sun Roujia, but he also knew that Sun Roujia's family and background weren't as good as his. They couldn't be together. At the same time, Fang Hongjian also knew that he couldn't give Sun Roujia the life she wanted. He couldn't give her a stable life and future. This feeling made him feel pain and helplessness, but he could not change the reality. This sentence also revealed some practical problems in society at that time, such as class differences, family background, life pressure, and marriage concepts. At that time, many men and women could not get the life they wanted. They had to face the balance and choice in the marriage market, which was often based on material conditions and family background. Therefore, this sentence also reflected the cruelty and complexity of society at that time.