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Jyutping gaa3 fe1 zing1
Pinyin kā fēi jīng

Definitions (Wiktionary)
  1. noun
    instant coffee
    (syn.) 速溶咖啡, 即溶咖啡

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Jyutping gaa3 fe1 zing1
Pinyin kā1fei jīng

Definitions (CC-CANTO)
  1. instant coffee; coffee essence [written and colloquial]