Yang Xingmi died in 905. Yang Wo succeeded him as the Tang military governor (
Jiedushi) of Huainan Circuit (淮南, headquartered in modern
Yangzhou,
Jiangsu) and the effective ruler of rest of Yang Xingmi's domain, which effectively became an independent state after rival warlord
Zhu Quanzhong seized the Tang throne and declared himself emperor of a new state of
Later Liang in 907—although Yang Wo continued to use the Tang
era name of
Tianyou and thus his domain remained technically a part of the defunct Tang state. He carried the title of Prince of Hongnong, which had been bestowed by the Tang imperial emissary
Li Yan. He honored his mother Lady Shi as Lady Dowager. However, Yang Wo lost most of his effective power in a coup headed by his officers
Zhang Hao and
Xu Wen in 907. He was angry about the situation, and Zhang and Xu thus feared that he would seize power again and carry out retribution against them. They therefore assassinated him in 908 and initially planned to divide up his territory and submit to Later Liang. However, at a subsequent emergency meeting between Zhang, Xu, and the other key officials, where Zhang initially postured that he was going to take over the domain, the official
Yan Keqiu read a statement out loud (which Yan claimed to have been written by Lady Dowager Shi, but Yan himself had written) that called for Yang Longyan to succeed Yang Wo as prince. Zhang did not dare to respond, and Yang Longyan was allowed to succeed Yang Wo as the Prince of Hongnong. Soon thereafter, Xu assassinated Zhang and blamed Yang Wo's death on Zhang alone, and took over effective rein of the state, formally under Yang Longyan's authority. When Xu went to the palace to report to Lady Dowager Shi what had occurred, she tearfully responded: Xu thereafter tried to comfort her and again blamed the assassination on Zhang alone. == As queen dowager ==