교우이신in English:the principle of friendship based on faith

Examples
with 교우이신.

• 교우이신은 친구를 사귈 때 중요한 원칙입니다.gyouuisin-eun chingu-reul sa-gil ttae jungyohan wonchik-imnida.The principle of friendship based on faith is an important principle when making friends.