Passages in received texts and in recently found legal documents show the different ways in which four terms refer to offices of Han imperial government; zhongdu guan indicates offices of the central government in the capital city; duguan signifies offices controlled by the central government but posted to work in the commanderies and counties; xianguan refers to just those offices but it is often used of “the government” in general, and in exceptional cases it specifies the emperor in person; xiandao guan were the offices of provincial government established in the counties (xian) and marches (dao).