《三国志·魏书·二公孙陶四张传》
袁绍闻讯，心中惊恐，将自己身上佩戴的渤海太守的印信和绶带都交给公孙瓒的堂弟公孙范，派他到渤海郡担任太守，想要以此拉拢他为援手。
绍惧，以所佩勃海太守印绶授瓒从弟范，遣之郡，欲以结援。
When Yuan Shao heard the news, he was terrified and handed over the seal and ribbon of the prefect of Bohai that he was wearing to Gongsun Zan's cousin, Gongsun Fan, and sent him to Bohai County to serve as prefect, hoping to win him over as a helping hand.