Columbia subject headings:
Harvard subject headings:
China--Politics and government--220-589.
China--Politics and government--221 B.C-220 A.D.
Ombudspersons--China--History.
Princeton subject headings:
China--Politics and government--220-589.
China--Politics and government--221 B.C.-220 A.D.
Ombudspersons--China--History.