傷敵一千，自損八百 [伤敌－－－－损－－]

Jyutping soeng1 dik6 jat1 cin1 ， zi6 syun2 baat3 baak3
Pinyin shāng dí yī qiān ， zì sǔn bā bǎi

Definitions (Wiktionary)
  1. phrase, idiomatic
    to inflict damage on the enemy while one's own side suffers a smaller but comparable level of damage
    (syn.) 損人不利己, 殺敵一千, 自损八百, 自損八百, 兩敗俱傷, 损人不利己, 杀敌一千, 两败俱伤