Emperor Zhaozong of Tang
Yang Pu was born in 900, during the reign of Emperor Zhaozong of Tang, as the fourth son of the major late-Tang warlord Yang Xingmi the military governor ("Jiedushi") of Huainan Circuit (淮南, headquartered in modern Yangzhou, Jiangsu), whose domain would become Wu eventually. His mother was Yang Xingmi's concubine Lady Wang. In 919, during the reign of his older brother Yang Longyan (King Xuan, Yang Xingmi's second son, who in turn succeeded another older brother, Yang Wo (Prince Wei of Hongnong)), Yang Pu was created the Duke of Danyang.