积羽沉舟

Explanation: Feathers, though small, are able to plot more pressure sink the ship. Accumulated little bad analogy would have serious consequences. 　　Usage: -Linked; as the predicate attribute; analogy can be caused by a large volume of small risk of disaster 　　Source: Han Liu Xiang "Warring Wei policy a": "Chen Wen Yu Shen Zhou plot, the group off-axis light, Zhongkoushuojin." 　　Examples: Is ~, silver and gold against the light load Oh. ★ per Anonymous "next life debt" off the third Thesaurus:  Congqingzhezhou, An ants' nest Dike, accumulation of straw break the camel's back, An ants' nest Bad dike