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Jyutping tau4 bat1 cung4 jung4
Pinyin tóu bǐ cóng róng

Definitions (CC-CEDICT)
  1. to lay down the pen and take up the sword (idiom)
  2. to join the military (esp. of educated person)
Definitions (Wiktionary)
  1. phrase, idiomatic, of a scholar
    to join the military
    (syn.) 弃笔从戎, 棄筆從戎
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    虽然屋企人都一致反对嘅决定,但佢都系不顾一切投笔从戎。
    雖然屋企人都一致反對嘅決定,但佢都係不顧一切投筆從戎。
    • He picked up the sword instead of pen regardless of the unanimous protest from his family.
Examples (Wiktionary)
  1. Mandarin
    投笔从戎
    投筆從戎
    tóu bǐ cóng róng
    • to cast aside the pen and join the army