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Jyutping tung4 man4 tung4 zung2
Pinyin tóng wén tóng zhǒng

Definitions (Wiktionary)
  1. phrase, idiomatic
    to share the same language and be of the same ethnicity
Examples (粵典–words.hk)
  1. Cantonese
    同文同种
    同文同種
    • Same language and same race