《资治通鉴·汉纪·汉纪二十三》
广汉男子郑躬等六十余人，攻打官府，劫走囚犯，盗取军械库兵器。郑躬自称山君。
广汉男子郑躬等六十馀人攻官寺，篡囚徒，盗库兵；自称山君。
More than 60 men in Guang Han, including Zheng Gong, attacked the government office, kidnapped prisoners, and stole weapons from the arsenal. Zheng Gong called himself the mountain king.