七十二行 [－－－－]

Jyutping cat1 sap6 ji6 hong4
Pinyin qī shí èr háng

Definitions (CC-CANTO)
  1. the 72 key categories of occupation
Definitions (粵典–words.hk)
  1. 名詞
    泛指​各行​各業
    all sorts of professions and trades