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Jyutping mong4 joeng4 bou2 lou4
Pinyin wáng yáng bǔ láo

Definitions (CC-CEDICT)
  1. lit. to mend the pen after sheep are lost (idiom)
  2. fig. to act belatedly
  3. better late than never
  4. to lock the stable door after the horse has bolted
Definitions (粵典–words.hk)
  1. 語句
    犯​錯後及​時​更正​仲有​得​補救
    never too late to take precautions after suffering a loss literally to fix the fences after goats disappearing
Definitions (Wiktionary)
  1. phrase, idiomatic
    to close the stable door after the horse has bolted; to act belatedly
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Definitions (HSK3.0)
  1. HSK3 七一九级词汇表 #4263
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    亡羊补牢。
    亡羊補牢。
    wáng yáng bǔ láo 。
    • Better late than never.
Examples (粵典–words.hk)
  1. Cantonese
    亡羊补牢
    亡羊補牢
    mong4 joeng4 bou2 nou4
    • to fix something after it had failed; literally: to fix the fences after goats disappearing
Examples (Wiktionary)
  1. Mandarin
    亡羊补牢
    亡羊補牢
    wáng yáng bǔ láo
    • to repair the pen after sheep is lost
  2. Mandarin
    亡羊补牢,犹未迟也。
    亡羊補牢,猶未遲也。
    wáng yáng bǔ láo , yóu wèi chí yě .
    • Repairing a sheep pen only after a sheep is lost is not considered tardy.