《资治通鉴·唐纪·唐纪八十一》
朱全忠派遣他的部将曹延祚率领军队与杜洪共同守卫鄂州。庚子，淮南将领刘存攻取鄂州，生擒杜洪、曹延祚及汴州兵士一千余人送往广陵，把他们全部杀死。
硃全忠遣其将曹延祚将兵与杜洪共守鄂州，庚子，淮南将刘存攻拔之，执洪、延祚及汴兵千余人送广陵，悉诛之。
Zhu Quanzhong dispatched his subordinate general Cao Yanzhuo to lead the army along with Du Hong to defend Ezhou together. On Gengzi, the Huainan general Liu Cun captured Ezhou, and took Du Hong, Cao Yanzhuo, and over a thousand soldiers from Bianzhou alive and sent them to Guangling, where they were all killed.