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Jyutping tung4 hang4 jyu4 dik6 gwok3
Pinyin tóng háng rú dí guó

Definitions (Wiktionary)
  1. proverb
    people of the same trade or occupation are always pitted against each other

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Jyutping tung4 hong4 jyu4 dik6 gwok3
Pinyin tóng háng rú dí guó

Definitions (CC-CANTO)
  1. to describe two people in the same industry are always like two countries in rivalry
Definitions (粵典–words.hk)
  1. 語句
    同一​個行​業​嘅​人​競​爭​激烈​,​激烈​到​有如​國家​互相​交戰​,​關​係​敵​對
    the most bitter rivalries and hatred exist among people in the same profession; literally: one's trade is like an enemy country
Examples (粵典–words.hk)
  1. Cantonese
    同行如敌国
    同行如敵國
    tung4 hong4 jyu4 dik6 gwok3
    • the most bitter rivalries and hatred exist among people in the same profession