Ma Chao’s abandonment of his father,a political hostage in Cao Cao’s hands,was widely denounced by his contemporaries.This case can be seen from multiple points of view,among them that of Eastern Han society,with its veneration of filial piety,fraternal duty,moral integrity and righteousness,and that of the social mores of the Northwestern ethnic groups in the Liangzhou area.The hostage system was also closely connected with the diplomatic struggles between Wei and Wu.Sun Quan’s diplomatic strategy in the Battle of Yiling,and especially his successful refusal of Cao Pi’s demand that he send his son as a hostage,not only gained space for the existence and continuance of Wu,but also,to some extent,delayed Wei’s unification of the three kingdoms.In Wei’s decisive conquest of Shu,the practice of taking diplomatic hostages and the law on punishment of deserters(shi wang fa 士亡法) played a role in preventing Zhong Hui from rising in rebellion.By taking into account the special background of the wars of this period,from the division of the late Han through to unification in the early Jin,and by extending our approach to encompass the Confucian culture of filial piety,we may be able to gain a deeper understanding of the practice of hostage taking at that time.