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Jyutping goi2 wan6
Pinyin gǎi yùn

Definitions (Wiktionary)
  1. verb, Hokkien
    to change one's luck by seeking a fortuneteller or a Taoist priest
  2. verb
    to alter one's fate; to improve one's luck

改運 [-运]

Jyutping
Pinyin gǎi yùn

Definitions (CC-CEDICT)
  1. to alter one's fate
  2. to improve one's luck (e.g. by changing one's name or phone number)