Rong Jin really did not have it easy these few days. Princes hurting each other to fight for power and authority was one of the things that the Emperor hated the most.
Emperor Jiawen had earned his throne in a similar manner back then, so he was extremely sensitive and suspicious about this.
Of course, he knew that this was an unavoidable fight in the royal family. However, he did not believe that Rong Jin was the first to strike.
Back then, the Emperor's father did not appoint the Crown Prince until way later, causing his other brothers and him to fight brutally. Thus, when it was his turn to choose, he appointed the Empress's eldest son—Rong Jin—as the Crown Prince early on as he was afraid that history would repeat itself.
However, reality was different from his wishes, and Rong Jin really disappointed him thoroughly.