河水不犯井水 hé shuǐ bù fàn jǐng shuǐ

hé shuǐ bù fàn jǐng shuǐ phrase river water does not interfere with well water; Do not interfere with one another.
Domain: Proverb 谚语
Notes: (CC-CEDICT '河水不犯井水')