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Jyutping tau4 zoeng2 zai2
Pinyin tóu zhǎng zǎi

Definitions (粵典–words.hk)
  1. 名詞
    大仔​,​長​子
    the eldest son

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Jyutping tau4 coeng4 zai2
Pinyin tóu zhǎng zǐ

Definitions (CC-CANTO)
  1. eldest son