堤溃蚁穴

Explanation: Small ants, so that banks can break. Metaphor not pay attention to little things, it will out of big trouble. 　　Source: "Han Fei Yu old" A little knowledge, of an ant hole collapse; hundred feet of the treasure, to sudden gap of burning tobacco. "San Guowei should Qu" Miscellaneous Poems "minor can be careless, since the leak will sink a great ship." Thesaurus:  Ant hole embankment collapse