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Jyutping hoi1 fong1 zi2
Pinyin kāi fāng zi

Definitions (Wiktionary)
  1. verb, verb-object
    to write a prescription; to prescribe medicine
    (syn.) 開方, 派藥, 处方, 开药, 开药仔, 開藥仔, 开方, 開藥, 派药, 處方
Examples (Wiktionary)
  1. Mandarin
    开方子
    開方子
    kāi fāng zi
    • to write out a traditional Chinese medicine prescription