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Jyutping fan4 gou1 gai3 gwai2
Pinyin fén gāo jì guǐ

Definitions (CC-CEDICT)
  1. to burn the midnight oil (idiom); to work continuously night and day
Definitions (Wiktionary)
  1. phrase, idiomatic
    to burn the midnight oil
    (syn.) 燃膏繼晷, 继晷焚膏, 燃膏继晷, 繼晷焚膏
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)