一粒老鼠屎坏了一锅粥 (一粒老鼠屎壞了一鍋粥) yī lì lǎoshǔ shǐ huàile yīguōzhōu

yī lì lǎoshǔ shǐ huàile yīguōzhōu phrase a piece of rat feces spoiled the whole pot of congee; one bad apple can spoil the whole bunch
Domain: Proverb 谚语
Notes: (CC-CEDICT '一粒老鼠屎壞了一鍋粥')