前车之鉴

Explanation: Reference: the mirror, the lessons learned. Lesson in front of the car overturned. The failure of the previous analogy, can be used as a future lesson. 　　Usage: Partial official; as subject, object; to advise people 　　Source: Han Liu Xiang, "said park good": the "" Book Week ", saying: 'before the car overturned car quit'." 　　Examples: ~, At your own thoughts. (Qing Chen Chen, "Water Margin after the transfer," the twenty-fifth back) Thesaurus:  great person given an important post by another country, Chu before hiring, The hiring of foreign talent, Pernicious, another's good quality, or suggestion, whereby one can remedy one's own defects, take warning from Antonym Group:  A loss minor success, obtain materials from local sources; draw on local resources, gain and loss considerable, The Hill borrow, one loses a thing which people at his side pick up