Prince of Jin
The region that Li Keyong ruled subsequently became the state of Jin after Tang's fall in 907 (as Li Keyong carried the Tang-bestowed title of Prince of Jin), and after Li Keyong's death in 908, Li Cunxu succeeded him as the Prince of Jin, in rivalry with Tang's main successor state Later Liang. Li Cunxu subsequently made his adoptive brother (Li Keyong's adoptive son) Li Siyuan, a major general, the prefect of Dai Prefecture (代州 in modern Shuozhou, Shanxi). While Li Siyuan served as the prefect of Dai, he became impressed with Shi Jingtang and gave his Empress Li to Shi in marriage. Shi subsequently served under Li Siyuan in campaigns, becoming one of the two prominent officers under Li Siyuan (along with Li Siyuan's adoptive son Li Congke) due to his battlefield accomplishments.