the wife of Yuan Xie (元燮, not the same person as the Prince of Pengcheng) the Prince of Anding, and through her Gao apparently became aware of Yuan Xiang's crimes, and so he used the evidence of those crimes to further accuse Yuan Xiang of plotting treason. Emperor Xuanwu stripped Yuan Xiang of his title and posts, and Yuan Xiang soon thereafter died, and his associates were executed. Gao further suggested Emperor Xuanwu to put the imperial princes under heavy guard, and, despite opposition from Yuan Xie the Prince of Pengcheng, Emperor Xuanwu agreed, effectively putting those princes under house arrest. In 507, Gao's power was so well known that after the famed music director Gongsun Chong (公孫崇) spent three years trying to get his revisions to imperial musical numbers adopted officially but was unable to, he had a solution—asking Gao to be in charge of the project, despite Gao's lack of musical knowledge. Emperor Xuanwu approved of the appointment, allowing Gongsun's project to proceed. Later that year, Emperor Xuanwu's wife Empress Yu died, and in early 508 her son (and Emperor Xuanwu's only son by that point) Yuan Chang (元昌) died as well. It was believed, although unproven, that both Empress Yu and Yuan Chang were murdered by Gao Zhao and Consort Gao. In 508, Emperor Xuanwu created Consort Gao empress, despite opposition by Yuan Xie the Prince of Pengcheng. Gao Zhao thereafter became resentful of Yuan Xie. When Emperor Xuanwu's brother Yuan Yu (元愉) the Prince of Jingzhao rebelled that year after believing that Gao was falsely accusing him, Gao in turn falsely accused Yuan Xie of working both in concert with Yuan Yu and rival Liang Dynasty. Emperor Xuanwu believed this, and secretly forced Yuan Xie to commit suicide during an imperial gathering. The populace quickly came to believe that Gao was involved in the death of the highly popular Yuan Xie, and from that point on Gao became even more despised by the people and nobles alike. Apparently apprehensive about this resentment, when Gao Zhao's son Gao Zhi (高植) made contributions in subsequently defeating Yuan Yu, Gao Zhi declined all awards offered him. In 512, Gao Zhao was made prime minister, but was displeased because at the same time he was relieved of a lower post that allowed him to meet with the emperor daily. This display of displeasure became the topic of ridicule among officials.