Duan Heyu

Duan Yu (1083–1176), courtesy name Heyu, also known by his temple name as the Emperor Xianzong of Dali, was the 16th emperor of the Dali Kingdom, reigning between 1108 and 1147. Following a family tradition, Duan's father, Duan Zhengchun, abdicated and became a monk in 1108. Duan succeeded his father as the emperor of Dali and renamed himself Duan Zhengyan (段正嚴). He abdicated and became a monk in 1147 and was succeeded by his son Duan Zhengxing. Provided by Wikipedia