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Jyutping hoi1 gyun2
Pinyin kāi juàn

Definitions (CC-CEDICT)
  1. to open a book
  2. open-book (exam)
Definitions (粵典–words.hk)
  1. x
Definitions (Wiktionary)
  1. verb, formal
    to open a book; to read
  2. verb, attributive, of examinations, often
    to be open-book
Examples (粵典–words.hk)
  1. Cantonese
    开卷有益。
    開卷有益。
    hoi1 gyun2 jau5 jik1.
    • Reading is good for us.
Examples (Wiktionary)
  1. Mandarin
    开卷有益
    開卷有益
    kāi juǎn yǒu yì
    • reading is beneficial