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Jyutping goi2 hong4
Pinyin gǎi xìng

Definitions (Wiktionary)
  1. verb, literary
    to change (oneself)
    • 改行自新
      改行自新
      gǎi xíng zì xīn
      to turn over a new leaf

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Jyutping goi2 hong4
Pinyin gǎi háng

Definitions (CC-CEDICT)
  1. to change profession
Definitions (粵典–words.hk)
  1. 動詞
    改做​另​一個​行業
    to change one's occupation
    • 有飛機師畀人炒咗之後,改行做的士司機。
      有飞机师畀人炒咗之后,改行做的士司机。
      jau5 fei1 gei1 si1 bei2 jan4 caau2 zo2 zi1 hau6, goi2 hong4 zou6 dik1 si2 si1 gei1.
      An ex-pilot, after getting sacked, became a taxi driver.
  2. 近義詞
    轉行
Definitions (Wiktionary)
  1. verb, verb-object
    to change profession
    (syn.) 轉行, 转行, 轉途, 改途, 转途, 换途, 換途
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    有飞机师畀人炒咗之后,改行做的士司机。
    有飛機師畀人炒咗之後,改行做的士司機。
    jau5 fei1 gei1 si1 bei2 jan4 caau2 zo2 zi1 hau6, goi2 hong4 zou6 dik1 si2 si1 gei1.
    • An ex-pilot, after getting sacked, became a taxi driver.
Examples (Wiktionary)
  1. Mandarin
    改行自新
    改行自新
    gǎi xíng zì xīn
    • to turn over a new leaf