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Jyutping saam1 min6 hung4 kei4
Pinyin sān miàn hóng qí

Definitions (Wiktionary)
  1. name, historical
    Three Red Banners (the General Line for socialist construction, the Great Leap Forward, and the people's communes)
Examples (粵典–words.hk)
  1. Cantonese
    三面红旗
    三面紅旗
    saam1 min6 hung4 kei4
    • “Three Red Flags” (consisted of General Line for socialist construction, the Great Leap Forward and the people's communes, an ideological slogan in the late 1950s)