Columbia subject headings:
China--Economic conditions--2000-
China--Social conditions--2000-
Migrant labor--China.
Rural-urban migration--China.
Harvard subject headings:
China--Economic conditions--2000-
China--Social conditions--2000-
Migrant labor--China.
Rural-urban migration--China
Princeton subject headings:
Agricultural laborers--China.
China--Economic conditions--2000-
China--Social conditions--2000-
Rural-urban migration--China.