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Jyutping jat6 si4 mou4 hou2 gong2 jan4 , ngam3 si4 mou4 hou2 gong2 gwai2
Pinyin rì shí wú hǎo jiǎng rén , àn shí wú hǎo jiǎng guǐ

Definitions (Wiktionary)
  1. proverb, Hakka
    a closed mouth catches no flies