The border guard demoralization and clan predicament were two major border problems in Jia Jing’s Reign. With the decline of land reclamation system and expansion of imperial population, the financial crisis in the mid Ming Dynasty made the shortage of army pay and clan salaries more serious. The border guard demoralization deteriorated the living environment of clan there; conversely, clan predicament also deteriorated the border situation. This presented a vicious circle, which reflected in the Zhu Chongzhuo (Datong Clan) rebellion.The treason and plot by Zhu Chongzhuo would have been successful if that unexpected event did not happen,which it finally trigger the butterfly effect and led to its failure.And this failure reflected the paradox between the clan system’s original blueprint and historical destiny.