Imperial Household Department
With the establishment of the Qing dynasty and the maturity of its political system, booi were organized into Booi Gusa (Manchu: Slave Banner) and incorporated into both the Eight Banners Army and the Imperial Household Department. Booi had since become part of the Qing dynasty political hierarchy, with the emperor being the Master, and emperor's booi working for the Master and the imperial court simultaneously. When addressing the emperor, booi would refer to themselves as "Nupu" or "Nucai" (, or ). But when booi were addressing others, even though they were "Nucai of the emperor" (), they would refer to themselves as "Superior officials of the Han Chinese" ().