Columbia subject headings:
Harvard subject headings:
Bo Hai Region (China)--Economic conditions.
China--Foreign economic relations--Korea (South)
Industries--China--Bo Hai Region.
Korea (South)--Foreign economic relations--China.
Princeton subject headings:
Bo Hai Region (China)--Economic conditions.
China--Foreign economic relations--Korea (South).
Industries--China--Bo Hai Region.
Korea (South)--Foreign economic relations--China.