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Jyutping hong1 kin4 sing6 sai3
Pinyin kāng qián shèng shì

Definitions (CC-CEDICT)
  1. booming and golden age of Qing dynasty (from Kang Xi to Qian Long emperors)
Definitions (Wiktionary)
  1. name, historical
    High Qing era (the era when the Kangxi, Yongzheng, and Qianlong Emperors reigned)
    (syn.) 康雍乾盛世