杞人之忧 (杞人之憂) qǐ rén zhī yōu

qǐ rén zhī yōu set phrase a person from Qi worries [about the sky falling]; to worry based on groundless concerns
Domain: Idiom 成语
Notes: A variant of 杞人忧天 (CC-CEDICT '杞人之憂'; Guoyu '杞人之憂')