河ㄏㄜˊ水ㄕㄨㄟˇhéshuǐ不ㄅㄨˊbú犯ㄈㄢˋfàn井ㄐㄧㄥˇ水ㄕㄨㄟˇjǐngshuǐ

héshuǐ bù fàn jǐngshuǐㄏㄜˊ ㄕㄨㄟˇ ㄅㄨˋ ㄈㄢˋ ㄐㄧㄥˇ ㄕㄨㄟˇ

  1. 河水與井水各不相干。比喻兩者界限分明，互不相犯。例 「我們倆從此各走各的路，河水不犯井水」。

英lit. river water does not interfere with well water (idiom)​; Do not interfere with one another., Mind your own business.