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Jyutping jyu6 gaa3 can1 zing1
Pinyin yù jià qīn zhēng

Definitions (CC-CEDICT)
  1. the emperor leads his troops into battle (idiom)
  2. to take part personally in an expedition
Definitions (Wiktionary)
  1. noun
    military expedition commanded by the emperor in person
Examples (粵典–words.hk)
  1. Cantonese
    御驾亲征
    御駕親征
    jyu6 gaa3 can1 zing1
    • emperor personally leads his troops