划清界线

劃清界線
huàqīngjièxiàn
  1. (figurative) to draw a line; to have nothing to do with each other
  2. (literally) to draw clear boundaries
  3. to draw a line; to have nothing to do with each other
  4. to draw clear boundaries

Wiktionary

Entry Composition

1 划清 huàqīng to make a clear distinction; to differentiate clearly
2 界线 jièxiàn
  1. limits
  2. bounds
  3. dividing line