There are some really interesting symbolic threads running through this section that I think deserve attention. The water motif comes up again — Gu Nanyin fell into water and came out changed. That's not the first time this story has used water as a turning point, and it feels deliberate. She was pushed in, she emerged different, and now everyone is dealing with the consequences of that transformation.
The sword is another powerful symbol. Qin Xue drawing it and holding it to the Old Madam's neck — it's not just a plot device, it's a statement. The servant who was supposed to be invisible, the maid who was supposed to bow and scrape, is now the one holding power. The sword represents the complete inversion of the social order in this household. Everyone thought they knew their place, and Qin Xue just proved them all wrong.
And the gate — the shut courtyard gate is such a perfect symbol for Gu Nanyin's new stance. She's not opening herself to these people anymore. The grandmother can knock all she wants, but the gate stays closed. Gu Nanyin controls access to her own life now. She decides when and if she'll show up. That gate is a boundary, and for the first time, she's the one holding the key.
The whole text is really about power — who has it, who's trying to take it, and who's pretending to have it when they don't. Gu Yuanyao thinks he has power because he's a minister. The grandmother thinks she has power because she's an elder. But real power belongs to the Regent, and through Qin Xue, it's right there in Gu Nanyin's courtyard.