yī​lì​lǎo​shǔ​shǐ​huài​le​yī​guō​zhōu

one bad apple spoils the bunch

一粒老鼠屎坏了一锅粥 一粒老鼠屎壞了一鍋粥 yī​lì​lǎo​shǔ​shǐ​huài​le​yī​guō​zhōu
one bad apple spoils the bunch
Literally means one pellet of rat droppings ruined a whole pot of congee; used to describe how one small negative element or person can ruin something otherwise good.

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Referenced by