Feng Shui rule

Feng Shui is a practice in which the exact arrangement of your house adjusts the 'energy' of it for better or worse. You can blow a lot of money to get advice on how to best rotate your furniture to bring inner peace or something like that, and extremely minor adjustments can supposedly fuck the whole energy of the place up.

Wuxia is a genre of traditional martial arts adventurism which often involves invocation, implicit or explicit, of spiritual energy to overcome challenges.

As such, the poor lady coming home to an ambush by martial arts masters who have attuned themselves perfectly to the energies of her home are stripped of that advantage by their would-be victim rotating a chair.