When Cao Bao's turn came, he refused to drink wine, saying that he had never drank wine before and will never drink wine. Zhang Fei forced Cao to drink one cup, and then tried to force him to drink again but Cao stubbornly refused. Zhang was furious and ordered Cao Bao to be severely beaten up, and Cao Bao begged Zhang Fei to let him off on account of his son-in-law L* Bu.
Cao Bao
Zhang Fei