Yu Congrong has no prototype, and the role is fictional. Yu Congrong was a character in the battle of Changjin Lake. Yu Congrong, platoon leader of No.221of No.7 company, is from Sichuan. He is sunny and cheerful, and he is a soldier who exudes happiness from his heart. He looks informal on the surface, but his heart is delicate, always protecting Wanli behind his back. I usually like joking, but I am brave in the extremely dangerous battlefield.

Yu Congrong in the Battle of Changjin Lake had no archetypal characters, but the director of the play said that every character in the play was extracted from the real historical archetypal characters, or that every soldier in the Seventh Company was a microcosm of the soldiers who resisted US aggression and aided Korea at that time.