He was originally a lieutenant of the border army of the Dayin Dynasty. He was seriously injured when he was defeated and captured. He was actually an orphan of the previous royal family. Calm and sinister, kind and tolerant, he knows the art of war but hates tactics. On the day he was captured, he bombed the granary to seize the commander's seal, which was actually to support the secret counterattack. His true identity is the key to stirring up the situation in the northern border, and is also the enemy's commander-in-chief's thorn in the side.