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Jyutping coi3 ngoi6
Pinyin sài wài

Definitions (CC-CEDICT)
  1. territories beyond the Great Wall (old)
Definitions (粵典–words.hk)
  1. 名詞、文言
    長​城​以北​地​區​嘅​通​稱
    north of the Great Wall; wild north
Definitions (Wiktionary)
  1. noun
    area beyond the Great Wall (i.e. beyond the Yumen Pass, western Gansu province, Inner Mongolia)
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)