《史记·十二本纪·秦始皇本纪》
调遣更多的士卒前往王翦军队，于是打垮了燕太子的军队，攻下了燕国的蓟城，得到了太子丹的首级。
乃益发卒诣王翦军，遂破燕太子军，取燕蓟城，得太子丹之首。
He transferred more soldiers to Wang Jian's army and routed the army of the crown prince of Yan. Then he captured the capital of Yan, Jicheng, and beheaded the crown prince Dan.