Why did the Chinese consider themselves the only civilized country?

This was facilitated by the position of the peoples inhabiting China. Other than that, beliefs. The geography of their location told them that they live in the center of the earth, and closest to the sky. In the north there are nomads. In the east is the sea. There is a desert in the west. There is a huge river in the south. All religions that did not share them, they considered (hu), or barbarians.