Correct

井水不犯河水

/ jǐng shuǐ bù fàn héshuǐ /
Strokes

Definition

everyone minds their own business

Example

Definition

well water does not intrude into river water―each one minds his own business; you should stay out of things that don't concern you; with each going his own way

1
Duō
nián
lái
  
,
liǎ
zhí
一直
jǐngshuǐfànshuǐ
井水不犯河水
  

We don't interfere with each other, and this has gone on for many years.