The entire dungeon in the palace was under the control of Prince Xuan's men, and any disturbance would be immediately known to him.
Tuoba Wuqing naturally didn't want Lu Ren to get involved.
Even if a rescue was necessary, she wouldn't let Lu Ren do it; she would send her own subordinates instead.
"Senior Brother Lu Ren, since you've come to me, I will certainly help you with this. I'll swallow my pride and meet with Prince Yong; he should agree to the matter of the Exotic Metal!"