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Jyutping lou5 hong4 zyun1
Pinyin lǎo xíng zūn

Definitions (粵典–words.hk)
  1. 名詞
    喺​某​行​業​做​咗​好​耐​嘅​人
    someone who has worked in a particular trade or profession for a long time
  2. 參看
    老行專

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Jyutping lou5 hang4 zyun1
Pinyin lǎo xíng zūn

Definitions (CC-CANTO)
  1. an expertise of a specialty (spoken)