周世宗
Li Jing was defeated in 958 by Later Zhou Emperor Chai Rong. The Southern Tang were forced to cede their territories north of the Yangtze and become a vassal of the Later Zhou. Li Jing additionally had to renounce claims to emperorship. The rump state was centered on Jiangnan, which was used by both the Later Zhou and the Song to refer to the Southern Tang. Later Zhou correspondence called Li Jing the "Ruler of the State of Jiangnan" (江南國主). He however used the title "Ruler of Tang" (唐國主) and "Seal of Tang" (唐國之印) for the government.