Great Wall of China vs China

Great Wall of China and China both are nouns.

Word	Noun	Adjective	Verb	Adverb
Great Wall of China	Yes	No	No	No
China	Yes	No	No	No

Great Wall of China (noun)	China (noun)
a fortification 1,500 miles long built across northern China in the 3rd century BC; it averages 6 meters in width	a communist nation that covers a vast territory in eastern Asia; the most populous country in the world
	a government on the island of Taiwan established in 1949 by Chiang Kai-shek after the conquest of mainland China by the Communists led by Mao Zedong