See also Kaifeng on Wikipedia, Caifum on Wiktionary, and the Encyclopædia Britannica, 1st edition, disclaimer. It is actually located at 34° 47′ N., 114° 20′ E.
CAIFUM, a city of China, situated in the province of Honan, on the river Crocceus, three hundred and fifty miles north-west of Nanking: E. long. 113° 30′, and N. lat. 35°.