Wu State is a bustling metropolis to the south of Capital City, and if there's one thing everyone there knows of, it's the Xus. The Xus are the preeminent family in Wu State with an untouchable status.
In Wu State, not only do the Xus hold formidable power in the military and political realms, but their strength in commerce and the underground is unequaled as well, making them the undisputed top family.
There's a saying in Wu State, "Rather provoke King Yama than cross the Xu lads." Once, someone who crossed the Xus in Wu State mysteriously disappeared the next day. And given the Xu's influence, the authorities turn a blind eye to such incidents, not daring to raise the Xus' ire.