Columbia subject headings:
Bureaucracy--China--History.
China--Commercial policy.
Merchants--China--History.
Tax collection--China--History.
Harvard subject headings:
Bureaucracy--China--History.
China--Commercial policy.
Merchants--China--History
Tax collection--China--History.
Princeton subject headings:
Bureaucracy--China--History.
China--Commercial policy.
Merchants--China--History.
Tax collection--China--History.