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Jyutping zeon3 gung1
Pinyin jìn gōng

Definitions (CC-CEDICT)
  1. to enter the emperor's palace
  2. (slang) to go to jail
Definitions (Wiktionary)
  1. verb, historical
    to be put in prison; to be sent to jail
  2. verb, historical
    to enter the palace; to be presented at court