Empress Dowager Xu (Chinese: 徐太后; personal name unknown) (died 926), honored as Empress Dowager Shunsheng (Chinese: 順聖太后) during the reign of her son Wang Yan (né Wang Zongyan), known as Consort Xu with the imperial consort rank Xianfei (徐賢妃) during the reign of her husband Wang Jian (Emperor Gaozu), was an empress dowager of the Chinese Former Shu dynasty. She was one of the favorite concubines of Wang Jian, the founder of Former Shu, and through her palace machinations was able to have her son Wang Yan (who was then named Wang Zongyan) made Wang Jian's heir. She was described as beautiful and capable of writing poems, but corrupt. After Former Shu's destruction by Later Tang, she, her son, as well as the rest of the Former Shu imperial family, were executed by Emperor Zhuangzong of Later Tang.