唐 ㄊㄤ ˊ táng 睿 ㄖㄨㄟ ˋ ruì 宗 ㄗㄨㄥ zōng Emperor Ruizong of Tang, reign name of sixth Tang emperor Li Dan 李旦[Li3 Dan4] (662-716), reigned 684-690 and 710-712