 Emperor Wenxuan's brother Gao Jun the Prince of Yong'an, once rebuked Yang for not trying to dissuade Emperor Wenxuan from his behavior, and Yang, who knew that Emperor Wenxuan was particularly suspicious whenever governmental officials conversed with imperial princes, reported the conversation to Emperor Wenxuan, eventually leading to Gao Jun's imprisonment and death.By 559, Yang's title was Prince of Kaifeng.Emperor Fei's uncle Gao Yan the Prince of Changshan, while respected by the people, was not given great power, and while his (and Emperor Wenxuan's) mother Empress Dowager Lou Zhaojun had some desire to have Gao Yan made emperor instead, there was insufficient support at the time, and Yang, in fear that Gao Yan and another brother of Emperor Wenxuan, Gao Zhan the Prince of Changguang, would try to take power, took steps to curb their authorities.