前车之鉴 (前車之鑒) qián chē zhī jiàn

qián chē zhī jiàn set phrase warning from an a carriage in front; to learn a lesson from a defeated predecessor
Domain: Idiom 成语
Notes: (CC-CEDICT '前車之鑒'; Guoyu '前車之鑒'; Mathews 1931 '前車之鑒', p. 116)