Emperor Ai of Tang
Li Zuo was born in 892, at the main palace at the Tang imperial capital Chang'an. His father Emperor Zhaozong was already emperor at that point, and he was Emperor Zhaozong's ninth son. His mother was Consort He, who had previously given birth to an older brother of his, Li Yu, Prince of De, who was Emperor Zhaozong's oldest son.
Emperor Muzong of Tang
Emperor Muzong of Tang (July 26, 795 – February 25, 824), personal name Li Heng, né Li You (李宥) (name changed 812), was an emperor of the Tang Dynasty of China. He reigned from 820 to 824. Emperor Muzong was the son of Emperor Xianzong. He was created crown prince in 812 during the reign of Emperor Xianzong and, after Emperor Xianzong was allegedly assassinated by a eunuch, Li Heng was proclaimed emperor in 820.