Shangshu: "The emperor founded the country and the princes became families."
The Chinese word "Guo" was called Guo in ancient times, and Oracle Bone Inscriptions's original word was or, symbolizing holding weapons to defend territory. Add a mouth to the inscription to symbolize the city wall and form the present country, which means polis, city and capital.
After Qin and Han Dynasties, one country ruled the world. Because Confucian culture emphasizes "isomorphism of home and country", and home refers to family and clan, the conditions of "home" and "country" are formed, and country refers to the whole country. The "country" in China ancient books refers to the Central Plains dynasty formed by a certain surname family.
It is now called "home in the world"