Columbia subject headings:
Harvard subject headings:
Businesspeople--China--History.
China--Commerce--History--19th century.
China--Commerce--History--20th century.
China--Social conditions--1644-1912.
Middle class--China--History.
Princeton subject headings:
Businesspeople--China--History.
China--Commerce--History--19th century.
China--Commerce--History--20th century.
China--Social conditions--1644-1912.
Middle class--China--History.