Columbia subject headings:
Harvard subject headings:
China--Social conditions--221 B.C.-960 A.D.
China--Social conditions--960-1644.
China--Social conditions--To 221 B.C.
Migration, Internal--China--History.
Refugees--China--History.
Princeton subject headings:
Homeless persons--China.
Migration, Internal--China.
Refugees--China--History.
Rogues and vagabonds--China.