Jing praised Taizong of Liao for dethroning the Later Jin and petitioned him to allow the Southern Tang to repair the dilapidated Imperial Tang tombs of Chang'an. The request was denied and greatly infuriated Li Jing who then ordered meetings to formulate an invasion of the Central Plains. Han Xizai advised the Southern Tang Emperor to capture Bian at this time: Despite the motions made by the Khitan in founding an imperial dynasty, they treated the conquest as a "very large scale raid." Taizong soon departed for the Khitan homeland in March 947 and died on the journey Meanwhile, the Southern Tang were embroiled in a war of conquest against Min. This left them unable to effectively pursue a northern invasion. The campaign ended successfully late in 947. By this point however Liu Zhiyuan had already captured Bian from the Khitan and founded the Later Han dynasty. The opportunity to move against the north had been missed by the Southern Tang. Efforts by the Southern Tang to secure an alliance with the Liao against the northern dynasties continued to flounder. In 948 Liao and Southern Tang officials formulated a joint attack against the Later Han. Yet the Liao delayed for over a year. Once they did attack the Later Han, Khitan forces only raided Hebei. When Muzong took the Liao throne, securing aid became more difficult for the Southern Tang. He was far less interested in participating in Chinese affairs than his predecessors. In 955 the Later Zhou began a campaign to subdue the Southern Tang. Li Jing requested military intervention by Muzong. His brother-in-law was sent to Tanzhou as an envoy to the Southern Tang in 959. The Liao were treated to a sumptuous feast by their Southern Tang hosts. Spies loyal to the Later Zhou were among those present. Muzong's brother-in-law was beheaded by the Later Zhou spies. The Liao court was unaware that the Later Zhou perpetrated the murder. Muzong furiously revoked all contact with Li Jing, ending Liao-Southern Tang relations. Goryeo In 936 Taejo united the Korean Peninsula under Goryeo. The newly formed state bordered the Khitans. The Later Jin reigned as a Khitan vassal which made them undesirable to the Koreans. The strategic position of Goryeo was likely valued by the Southern Tang as a means to threaten the Khitan. Taejo sent a tribute mission to the Southern Tang in the summer of 938. A