Emperor Ai of Tang
Emperor Ai of Tang (27 October 89226 March 908), also known as Emperor Zhaoxuan (), born Li Zuo, later known as Li Chu (), was the last emperor of the Tang dynasty of China. He reigned—as but a puppet ruler—from 904 to 907. Emperor Ai was the son of Emperor Zhaozong.
Xianbei
In 534, the Northern Wei split into an Eastern Wei (534-550) and a Western Wei (535-556) after an uprising in the steppes of North China inhabited by Xianbei and other nomadic peoples. The former evolved into the Northern Qi (550-577), and the latter into the Northern Zhou (557-581), while the Southern Dynasties were pushed to the south of the Yangtze River. In 581, the Prime Minister of Northern Zhou, Yang Jian, founded the Sui dynasty (581-618). His son, the future Emperor Yang of Sui, annihilated the Southern Chen (557-589), the last kingdom of the Southern Dynasties, thereby unifying northern and southern China. After the Sui came to an end amidst peasant rebellions and renegade troops, his cousin, Li Yuan, founded the Tang dynasty (618-907); Li led China to develop into one of the most prosperous states in history. Sui and Tang dynasties were founded by Han Chinese generals who also served the Northern Wei dynasty. Through these political establishments, the Xianbei who entered China were largely merged with the Han, examples such as the wife of Emperor Gaozu of Tang, Duchess Dou and Emperor Taizong of Tang's (Li Shimin's) wife, Empress Zhangsun, both have Xianbei ancestries, while those who remained behind in the northern grassland emerged as later powers to rule over China.