"I suppose I have," he nods. "But I imagine it holds less meaning to me, as someone not from your world, than it does to him. Which isn't to say I'm not interested, I just... The succession of kings and emperors in your world is probably a little like me telling you the history of Marine leadership in mine."

The important parts are not Cao Pi's father himself, but what Cao Pi's reaction to all of this is. He's bothered, he gives it a great deal of importance. He almost certainly resents the man. Cao Pi is someone who had power and who willingly gave it up for the sake of his own political survival. All things he'll file away in his mind, should they become relevant later, but knowledge of his father is slightly more... academic.