Why did Pan Jinlian open the window?

Pan Jinlian wants to open the window because she feels depressed and wants to get some air. However, her action of opening the window triggered a series of events, which led to a series of unpredictable consequences. In the story of Water Margin, Pan Jinlian accidentally dropped a stick while opening the window and hit Ximen Qing on the head, which triggered a series of chain reactions, eventually leading to the death of Wu Dalang and Pan Jinlian's own tragic fate.