唐僖宗
It is not known when Lady Shi was born. According to the "Spring and Autumn Annals of the Ten Kingdoms" (), her family was from the Qi-Lu region (i.e., modern Shandong), but the same source also noted a possible alternative origin—that she was a cousin of Shi Jingsi, a general under Jin's prince Li Keyong. She became a concubine of Yang Xingmi's during the reign of Emperor Xizong of Tang (r. 873-888) and bore him his two oldest sons, Yang Wo (born 886) and Yang Longyan (born 897). There was no record on whether Yang Xingmi made her his wife after he divorced his wife Lady Zhu in 903, but it is known that she was created the Lady of Yuzhang, while Lady Zhu previously held the greater title of Lady of Yan.