city vs Hangzhou

city and Hangzhou both are nouns.

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

city (noun)	Hangzhou (noun)
people living in a large densely populated municipality	a city of eastern China on Hangzhou Bay; regarded by Marco Polo as the finest city in the world
a large and densely populated urban area; may include several independent administrative districts
an incorporated administrative district established by state charter