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Jyutping jau4 sing6 zyun2 seoi1
Pinyin yóu shèng zhuǎn shuāi

Definitions (CC-CEDICT)
  1. from prosperity to decline
  2. at its peak before the decline
Examples (Wiktionary)
  1. Mandarin
    安禄山以“清君侧”的名义发动安史之乱,令唐朝由盛转衰。
    安祿山以“清君側”的名義發動安史之亂,令唐朝由盛轉衰。
    ān lù shān yǐ “ qīng jūn cè ” de míng yì fā dòng ān shǐ zhī luàn , lìng táng cháo yóu shèng zhuǎn shuāi .
    • An Lushan initiated the An Lushan Rebellion under the pretext of "clearing evil ministers around the ruling monarch", which caused the demise of Tang Dynasty.