 Wu Tianxi tried to flee, but he was reached by Li Yuanba quickly in front of the Tianchang Pass.Then he was killed by the superb warrior during the ensuing battle.In the novel, Luo Cheng (罗成) was the son of Luo Yi (罗艺), a famous general guarding the northeastern frontier town of Sui Dynasty, the town of Jizhou (冀州), which is near modern-day Beijing.