Lanzhou vs urban center

Lanzhou and urban center both are nouns.

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

Lanzhou (noun)	urban center (noun)
the capital city of the Chinese province of Gansu on the Yellow River	a large and densely populated urban area; may include several independent administrative districts