苦旅

jīng guò cháng qī kǔ lǚ ér bù tǎo yàn bǐ cǐ de rén shì kě yǐ jié jiāo zuò péng you de

经过长期苦旅而不讨厌彼此的人，是可以结交作朋友的。

People who go through a long hard journey together without incurring each other's dislike can become good friends.