杞人忧天 (杞人憂天) qǐ rén yōu tiān

qǐ rén yōu tiān set phrase a person from Qi is scared of the sky falling
Domain: Idiom 成语
Notes: (CC-CEDICT '杞人憂天'; CCI '杞人憂天', pp. 77-78; Guoyu '杞人憂天'; Mathews 1931 '杞人憂天', p. 71)