China
proper noun
The middle country... who could that be? Let's think about it. Who invented kanji and therefore probably thinks they're the middle of the world? Who also is just a huge country that ruled much of Asia? That would be none other than China.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well. Just make sure you watch out for the rendaku.
中国の人口は日本よりも大きい。
China's population is larger than Japan.
中国には有名な山がたくさんあります。
There are many famous mountains in China.
私のマッサージの先生は中国人です。
My massage instructor is a Chinese person.