What does it mean to walk into a besieged city?

Fortress Besieged, originally a Chinese name, refers to encircling the city, but the word Fortress Besieged is more famous for Qian Zhongshu's novel Fortress Besieged, 1946.

The besieged city in Qian Zhongshu's Fortress Besieged means that people in the city want to go out and people outside the city want to go in.

The besieged castle, people outside the city want to rush in and people in the city want to escape, which runs through the novel Fortress Besieged and has become a classic saying of this novel.

Fortress Besieged is an extension of the latter, that is, in a certain circle (entertainment circle, marriage circle, etc.). ), people outside want to go in and people inside want to come out. "Walking into a besieged city" means walking into a circle where outsiders look good and people inside look bad.