Lanzhou vs city

Lanzhou and city both are nouns.

Word	Noun	Adjective	Verb	Adverb
Lanzhou	Yes	No	No	No
city	Yes	No	No	No

Lanzhou (noun)	city (noun)
the capital city of the Chinese province of Gansu on the Yellow River	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts
	an incorporated administrative district established by state charter