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Jyutping daa2 tit3 sin1 dak1 bun2 san1 ngaang6
Pinyin dǎ tiě xiān děi běn shēn yìng

Definitions (Wiktionary)
  1. phrase, idiomatic
    Synonym of 打鐵還需自身硬/打铁还需自身硬 (dǎtiě hái xū zìshēn yìng).
    (syn.) 打鐵還需自身硬, 打铁还需自身硬