打麻雀运动 (打麻雀運動) dǎ máquè yùndòng

dǎ máquè yùndòng proper noun Great Sparrow Campaign / Four Pests Campaign
Domain: History 历史 , Subdomain: China 中国
Notes: One of the actions during the Great Leap Forward 大跃进 aiming to eliminate four pests: rats, flies, mosquitoes, and sparrows (CC-CEDICT '打麻雀運動'; Guoyu '打麻雀運動'; Wikipedia '打麻雀运动')