Columbia subject headings:
China--Social conditions--1949-1976.
China--Social conditions--1976-2000.
Social interaction--China.
Harvard subject headings:
China--Social conditions--1949-1976.
China--Social conditions--1976-
Social interaction--China.
Princeton subject headings:
China--Social conditions--1949-1976.
China--Social conditions--1976-2000.
Social interaction--China.