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Jyutping zam1 zim1 deoi3 mak6 mong1
Pinyin zhēn jiān duì mài máng

Definitions (Wiktionary)
  1. phrase, idiomatic, of two equally strong sides
    sharply opposed to each other, neither making any concessions

針尖對麥芒 [针-对麦-]

Jyutping
Pinyin zhēn jiān duì mài máng

Definitions (CC-CEDICT)
  1. sharply opposed to each other, with neither prepared to give an inch (idiom)
Examples (Wiktionary)
  1. Mandarin
    针尖对麦芒
    針尖對麥芒
    zhēn jiān duì mài máng
    • lit. "needle's point versus awn of wheat"; fig. "(of two equally strong sides) sharply opposed to each other, neither making any concessions"