The Nine-tailed Fox uses his powers

Wu Yun steps away from the doorway with a sinking feeling in his stomach.

That conversation means that not only does Shu Ai know where they are, everything that happened was orchestrated by him. 

Just how far does his grasp reach? How much does he know of their movements?

Lan Tian notices the worried look in Wu Yun's face and approaches him discreetly. "What happened?"

Wu Yun shakes his head. He needs to get out of this room, and put as much distance between himself and Lian Feng as possible. 

He takes Lan Tian by the narrow sleeve of his servant robe, and drags him towards the doors, and outside of the room crawling with servants, in which they can be easily overheard.

"Where are the two of you going?" A servant asks, when they are almost at the doors. "We aren't done cleaning."

Lan Tian throws a pithy, "He's feeling sick," over his shoulder, bu the servant is undeterred.