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Jyutping long6 zi2 wui4 tau4 gam1 bat1 wun6
Pinyin làng zǐ huí tóu jīn bù huàn

Definitions (CC-CEDICT)
  1. a prodigal son returned home is worth more than gold
Definitions (Wiktionary)
  1. proverb
    It is rare when someone who has gone astray turns over a new leaf, so we should accept that person with open arms when the person does reform.
    (syn.) 敗子回頭金不換, 败子回头金不换
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    俗话说:浪子回头金不换;可俗话又说:狗改不了吃屎!
    俗話說:浪子回頭金不換;可俗話又說:狗改不了吃屎!
    sú huà shuō : làng zǐ huí tóu jīn bù huàn ; kě sú huà yòu shuō : gǒu gǎi bù liǎo chī shǐ !
    • The saying goes: to turn a new leaf is priceless. The saying also goes: a dog can't change their habits of eating shit!