An analysis of the system of recuiting sentries and border guards in the period of Guiyijun through examing the relevant Duanhuang documents found that: servicing as a sentry was a basic form of land-based corvée,from which the single-member household(though receiving some allowance if in service) cannot be exempted;as for the recruitment of border guards,the Guiyijung government at least enlisted those monks as well as secular people in economic trouble to back up its military force,whose debts would be re...