In a sense, in the old customs, virtue was associated with blood so in that regard that is Confuscianism at its core, because in ancient China I know enough, to know that if a low-born dude came out and was super nice, he'd be rejected on the simple principle that he wasn't 'virtuous' enough, in turn if a ruler had the best blood but was a regular Nero to the commoners but not the nobility, then he'd be regarded as 'virtuous' their history is rife with examples of this.
This is why Cao Cao, is also not considered a virtuous leader, despite his being a pretty virtuous one by modern standards, back then virtue was measured by the family tree, not by whatever standards we have today.
Also, I never said that Quan had a right to the land, only to the headhood of the family.
Anyways, back to the real interesting part; I repeat my question, about where Ce would expand, would he try attack the Liu family holdings, in the west I believe? Wonder what would happen then.