Luoyang vs urban center

Luoyang and urban center both are nouns.

Word	Noun	Adjective	Verb	Adverb
Luoyang	Yes	No	No	No
urban center	Yes	No	No	No

Luoyang (noun)	urban center (noun)
a city in east central China; the capital of ancient China during several dynasties	a large and densely populated urban area; may include several independent administrative districts