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Jyutping seon1 si1 mou5 bai6
Pinyin xún sī wǔ bì

Definitions (Wiktionary)
  1. phrase, idiomatic
    to engage in malpractices for selfish ends; to be involved in corruption
    (syn.) 营私舞弊, 營私舞弊

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Jyutping seon1 si1 mou5 bai6
Pinyin xùn sī wǔ bì

Definitions (CC-CEDICT)
  1. to abuse one's position for personal gain (idiom)