ㄅㄨˋㄉㄚˇㄅㄨˋㄒㄧㄤˋxiāngshì

不打不相识
bù dǎ bù xiāngshíㄅㄨˋ ㄉㄚˇ ㄅㄨˋ ㄒㄧㄤ ㄕˊ
  1. 經過爭執彼此反而相互了解結交 有道不打不相識咱們!」。

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