《北史·列传·卷五十九》
王世充大破李密军，众望更加归附，就自封为郑王，加九锡，准备帝王用的仪仗，杨侗不能禁止。
及世充破李密，众望益归之，遂自为郑王，总百揆，加九锡，备法物，侗不能禁。
Wang Shichong defeated Li Mi's army greatly. The crowd's expectations were even more attached, so he proclaimed himself King Zheng, added Jiuxi, and prepared the ritual instruments used by the emperor, which Yang Dong could not stop.