Fortress Besieged was a famous novel by Qian Zhongshu. The main plot of the novel takes place in China in the 1930s. It tells the story of a young man's two life experiences inside and outside the besieged city. The meaning of the siege could be understood from the following aspects: 1. Closed living environment: The besieged city in the novel is a closed place that is isolated from the outside world. People can only move around in the besieged city and have no contact with the outside world. This kind of environment was seen as a kind of "siege", implying the limitations and limitations of life. 2. The pursuit of freedom: Fang Hongjian, the protagonist of the novel, yearned for freedom, but his living environment did not allow him to pursue freedom. He could only find a balance in the besieged city to maintain his life. This pursuit of freedom was seen as a state of "siege", implying that human beings 'desire for freedom was often faced with various restrictions and obstacles. 3. Reflection on life: The two life experiences inside and outside the besieged city in the novel also triggered the author's thinking about the meaning of life. The people in the besieged city maintained their lives through self-restraint and balance in the limited space. The people outside the siege pursued a freer lifestyle, but were they truly free? This kind of reflection caused people to think about freedom and meaning. Fortress Besieged is a profound novel that reveals the limits and contradictions of life through the two life experiences inside and outside the fortress. At the same time, it also express people's pursuit and thinking about freedom and meaning.