不打不相识

Traditional (Taiwan): 不打不相識

bùdǎbùxiāngshí ㄅㄨˋ ㄉㄚˇ ㄅㄨˋ ㄒㄧㄤ ㄕˊ

    • lit. don't fight, won't make friends (idiom) an exchange of blows may lead to friendship
    • no discord, no concord

Character by character

Saying俗语俗語

Proverb谚语諺語 · In everyday use

Literally
without fighting, you don't get to know each other
Meaning
People often become friends after a clash or contest, because it lets them understand each other. Said of former rivals who get on well. Compare "fight and be friends."

Sources