What is XXX's brothers name?
Emperor Zhongzong of Tang
Emperor Zhongzong of Tang (26 November 656 -- 3 July 710), personal name Li Xian (李顯), at times during his life Li Zhe (李哲) and Wu Xian (武顯), was the fourth Emperor of the Tang Dynasty of China, ruling briefly in 684 and again from 705 to 710.
Li Xian