空室清野 kōng shì qīng yě

DEFINITIONS

  1. empty room, clean field (idiom); clean out everything to leave nothing for the enemy
  2. scorched earth policy

CHARACTERS

空 kōng empty, hollow, bare, deserted
室 shì room, home, house, chamber
清 qīng clear, pure, clean; peaceful
野 yě open country, field; wilderness