居中斡旋

jūzhōngwòxuán

to mediate between disputants

Wiktionary

Entry Composition

1 居中 jūzhōng
  1. to be between two parties (as in mediation)
  2. to be in the middle; to be in between
  3. (page layout) to be centered
2 斡旋 wòxuán to mediate (a conflict etc)