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Jyutping dung1 dou6 gwok3
Pinyin dōng dào guó

Definitions (Wiktionary)
  1. noun
    host country (for a competition, meeting, etc.)
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Definitions (兩岸三地生活差異詞語彙編—Two Shores Three Places)
  1. 日常用語:臺
    地主國
  2. 日常用語:陸
    東道國