According to the Song Dynasty historian Sima Guang, it was said that An was attempting to increase his own strength and planning a rebellion, and in 747, he claimed to be building Fort Xiongwu () and asked fellow military governor Wang Zhongsi to contribute troops, hoping to hold onto the troops that Wang would send and not return them. Wang, instead, led the troops himself to Xiongwu in advance of the rendezvous date and, after participating in the building project, returned with the soldiers, and submitted reports to Emperor Xuanzong that he believed An was planning treason. Li Linfu, who was at this point apprehensive of Wang as a potential rival, used this as one of the reasons to indict Wang, and Wang was, later in 747, removed from his post. Also in 747, An Lushan was given the honorary title as chief deputy imperial censor (御史大夫, "Yushi Daifu"), and Lady Duan, now described as his wife, although Lady Kang was still alive, was created a lady.