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Jyutping bei2 jik6 soeng1 fei1
Pinyin bǐ yì shuāng fēi

Definitions (CC-CEDICT)
  1. lit. a pair of birds flying close together (idiom)
  2. fig. two hearts beating as one
  3. name of a sweet and sour chicken wing dish
Definitions (Wiktionary)
  1. phrase, idiomatic, of a married couple
    to be together day and night; to help each other and move forward together
    (syn.) 比翼齐飞, 比翼齊飛