毁于一旦

Explanation: Once: the day. Something that once destroyed the hard-won 　　Usage: Partial official; as predicate, object; with derogatory 　　Source: Southern Song Fan Ye, "the Book Dourong Biography": "tired of the century, and once ruined." 　　Examples: Hundred years of hard-operation Yuanmingyuan, ~, is more a matter of great Henshi Zhuixinqixue. (Gao Yang, "Qing Unofficial History" under the book) Thesaurus:  commit sth. to the flames, Paid Bingding, melt away disappearance of misunderstanding, beyond the highest heavens, disappear forever