公元690年（天授元年），武则天宣布改唐为周，以洛阳为神都，降唐睿宗为皇嗣，自称皇帝，史称“武周革命”。
In 690 , Wu Zetian declared to change the Tang into the Zhou Dynasty , made Luoyang the deity capital , Tang Ruizong the royal heir , herself the Empress.The historical event was referred as " Wu Zhou Revolution " in history .
皇嗣