Poetry with outsiders

Translation between modern Chinese and classical Chinese: the word "Yi" can be used in classical Chinese. The "outsider" in classical Chinese can be "non-relative". "Hao" can be used in classical Chinese words. "Friends" can be used in the classical Chinese words of "one of our own". "Unjust" can be used in classical Chinese vocabulary. It can be said in classical Chinese that "being kind to outsiders is unjust to one's own people": it is unkind to be friends if you are not relatives.