Columbia subject headings:
Harvard subject headings:
China--Buildings, structures, etc.--Pictorial works.
China--History--Pictorial works.
Historic buildings--China--Pictorial works.
Postcards--China.
Princeton subject headings:
China--Buildings, structures, etc.--Pictorial works.
China--History--Pictorial works.
Historic buildings--China--Pictorial works.
Postcards--China.