Qiao Yun indeed wanted to keep people from the Zhou Family's trap.
But that didn't stop her from teaching the Zhou Family a lesson, had she not been well-prepared in advance, Lu Jingzhi and Lu Zhanxing would have long been kidnapped by the old master of the Zhou Family to be used as chips to threaten her.
Pei Ya echoed Qiao Yun's words, "Exactly, one-time each evens out the score, and moreover, the Second Master Zhou isn't doing this for the first time. As far as I know, he's been using drugs for several years now, it's just that you've been too muddle-headed to notice. We're just kindly letting you see clearly sooner what kind of successor you've chosen. You don't need to thank us too much."
He wasn't lying.
The old master of the Zhou Family, unaware of his impending doom, had reached out to the Lu Family, and naturally, Qiao Yun wouldn't let it go so easily.