Port Arthur vs People's Republic of China

Port Arthur and People's Republic of China both are nouns.

Word	Noun	Adjective	Verb	Adverb
Port Arthur	Yes	No	No	No
People's Republic of China	Yes	No	No	No

Port Arthur (noun)	People's Republic of China (noun)
a battle in the Chino-Japanese War (1894); Japanese captured the port and fortifications from the Chinese	a communist nation that covers a vast territory in eastern Asia; the most populous country in the world
a major port city in northeastern China on the Liaodong Peninsula; now a part of Luda