堅壁清野

Simplified: 坚壁清野

jiānbìqīngyě ㄐㄧㄢ ㄅㄧˋ ㄑㄧㄥ ㄧㄝˇ

    • to fortify defenses and raze the fields (idiom) to leave nothing for the invader
    • scorched earth policy

Character by character

Sources