Chunyu Qiong 's initial defences were overrun , and he retreated to hold his forts , which Cao Cao attacked and set on fire .
Cao Cao 's army disguised itself as a reinforcement unit from Yuan Shao and attacked Wuchao .
Chunyu Qiong 's initial defences were overrun , and Cao Cao retreated to hold Cao Cao 's forts , Cao Cao   Cao attacked and set on fire .
Cao Cao 's army disguised itself as a reinforcement unit from Yuan Shao and attacked Wuchao .