Empress Liu (Tang dynasty)

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Empress Liu (劉皇后, personal name unknown) (died 693), formally Empress Sumingshunsheng (肅明順聖皇后, literally "the solemn, understanding, serene, and holy empress") or Empress Suming (肅明皇后) in short, was an empress of the Chinese Tang dynasty. She was the wife of Emperor Ruizong.