Caifum

== English == === Etymology === From irregular Portuguese romanization of the Mandarin pronunciation of Chinese 開封 / 开封 (Kāifēng). === Proper noun === Caifum (obsolete) Alternative form of Kaifeng, a city on the Yellow River in central China, a former national capital. 1771, Encyclopaedia Britannica, 1st ed., Vol. II, p. 7: CAIFUM, a city of China, ſituated in the province of Honan, on the river Crocceus, three hundred and fifty miles north-weſt of Nanking...