You Won't Make Me Crown Prince? Then I'll Take the Throne

You promised I'd serve as a hostage for ten years, then come home to be made Crown Prince. And now you're saying I'm not as good as the third prince? So you're playing favorites? That's how you want to play it? Fine. If I'm not worthy of being Crown Prince, then I'll show the whole world who is! I take on the Crown Prince's civil service examination: the literary bells ring nine times, and my talent outshines the world! With Sun Tzu's Art of War in hand, I defeat three hundred thousand Northern Frontier wolf cavalry with thirty thousand men, surpassing all three armies in military prowess! I standardize writing and measurements, uniting the realm as one! I introduce potatoes and corn, improve rice, and ensure everyone has enough to eat and wear! I may refuse the Crown Prince's title, but the people of the realm already honor me as emperor! In the court hall! Lin Qianhan stands with his hands behind his back, clad in a five-clawed golden dragon robe! The assembled officials stand behind him and turn as one to face Emperor Wu: “Retired Emperor! Write your confession of guilt, then go back to scrubbing chamber pots. His Majesty still has court to attend!”