Columbia subject headings:
Belgium--Commerce--China.
Belgium--Foreign relations--China.
China--Commerce--Belgium.
China--Foreign relations--Belgium.
Harvard subject headings:
Belgium--Commerce--China.
Belgium--Foreign relations--China.
China--Commerce--Belgium.
China--Foreign relations--Belgium.
Princeton subject headings:
Belgium--Commerce--China.
Belgium--Foreign relations--China.
China--Commerce--Belgium.
China--Foreign relations--Belgium.