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Jyutping bui3 sing4 jat1 zin3
Pinyin bèi chéng yī zhàn

Definitions (Wiktionary)
  1. phrase, idiomatic
    Synonym of 背城借一 (bèichéng-jièyī, “to fight to the last ditch, to put up a desperate struggle”).
    (syn.) 背城借一