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Jyutping cin1 hei1 nin4
Pinyin qiān xī nián

Definitions (Wiktionary)
  1. noun
    a year at the turn of the millennium, especially the year 2000
    (syn.) 千禧

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Jyutping cin1 hei1 nin4
Pinyin qiān xǐ nián

Definitions (CC-CEDICT)
  1. millennium
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    千禧年
    千禧年
    cin1 hei1 nin4
    • the year 2000