四害 [－－]

Jyutping sei3 hoi6
Pinyin sì hài

Definitions (CC-CEDICT)
  1. "the four pests", i.e. rats, flies, mosquitoes, and sparrows
  2. see also 打麻雀運動|打麻雀运动[Da3 Ma2 que4 Yun4 dong4]