Columbia subject headings:
China--Commercial policy.
China--Foreign economic relations--Europe.
Economic zoning--China.
Europe--Foreign economic relations--China.
Silk Road.
Trade routes--China.
Harvard subject headings:
China--Commercial policy.
China--Foreign economic relations--Europe.
Economic zoning--China.
Europe--Foreign economic relations--China.
Silk Road.
Trade routes--China
Princeton subject headings:
China--Commercial policy.
China--Foreign economic relations--Europe.
Economic zoning--China.
Europe--Foreign economic relations--China.
Silk Road.
Trade routes--China.