huì​gū​bù​zhī​chūn​qiū

short-lived

蟪蛄不知春秋 huì​gū​bù​zhī​chūn​qiū
short-lived
literally "the cicada (Platypleura kaempferi) knows neither spring nor autumn"; used to describe a very short life span
to have a narrow perspective
used to describe someone with very limited experience or a narrow outlook on life