《资治通鉴·唐纪·唐纪三》
海岱盗贼首领徐圆郎带几州之地请求降唐，唐命他为兖州总管，封爵鲁国公。
海岱贼帅徐圆朗以数州之地请降，拜兗州总管，封鲁国公。
Sea salt thief leader Xu Yuanlang took several prefecture lands to request surrender to the Tang. Tang appointed him as the governor-general of Yanzhou and granted him the title Duke of Liguo.