Actually, given Xu Qing's current status, killing a princely heir of Duke Wei is merely a flick of the wrist, causing no harm to himself. However, he knows well that doing so would bring no benefit, only unnecessary trouble.
Better to let this young lord become his blade, to atone for past events.
With Feng Wu's suggestion to the Duke's Madam, the young lord is now striving hard at the Martial Arts Academy. He understands clearly that without his diligence, he cannot secure his position as the princely heir.
Ah, the affairs of the world are truly peculiar. The young lord back then would never have imagined that he would, one day, have to rely on the despised Xu Qing to maintain his princely heir position.
One might say a mere thought from Xu Qing could plunge him into hell, never to return. Hence, once recognizing reality, the young lord finds himself with no choice but to wholeheartedly assist Xu Qing in eliminating dissidents.
