What is XXX's brothers name?
Yang Longyan
Yang Longyan was born in 897, during the reign of Emperor Zhaozong of Tang; he was the second son of Yang Xingmi, who, by the time of his birth, was a major warlord as the military governor (Jiedushi) of Huainan Circuit (淮南, headquartered in modern Yangzhou, Jiangsu).