高丽 (Goryeo, 918-1392) reunified the Korean peninsula and gave the modern English word 'Korea' (via Marco Polo's 'Cauli'). In Chinese it's still the standard cultural shorthand for things Korean —
高丽参 (Korean ginseng),
高丽纸 (Korean rice paper). For modern North/South Korea the words are
朝鲜 (Cháoxiǎn) /
韩国 (Hánguó);
高丽 is reserved for historical or traditional-product contexts.