剛柔相濟 [刚－－济]

Jyutping gong1 jau4 soeng1 zai3
Pinyin gāng róu xiāng jì

Definitions (CC-CANTO)
  1. to reach a balance of toughness and gentleness in dealing with people
Definitions (Wiktionary)
  1. phrase, idiomatic
    combining vigor and suppleness