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Jyutping tung1 seon3 jyun4
Pinyin tōng xìn yuán

Definitions (CC-CANTO)
  1. a messenger
Definitions (Wiktionary)
  1. noun
    messenger (in the army, government body, etc.)
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)