刘武周
Around the same time, Li Gui's official An Xinggui (安興貴) captured Li Gui in a coup and surrendered the state to Tang. Tang, however, was facing a threat on a different front, as Liu Wuzhou made a major attack south, taking over much of modern Shanxi, which Tang had controlled, and appearing poised to further attack Tang's capital Chang'an. Around the same time, the lower Yangtze region, which had been in a state of confusion ever since Emperor Yang's death, was coalescing around three different competing figures—the former Sui official Shen Faxing, who declared himself the Prince of Liang and controlled much of the territory south of the Yangtze; the rebel leader Li Zitong, who controlled Jiangdu and the surrounding regions, declaring himself the Emperor of Wu; and Du Fuwei, who submitted to Tang and was created the Prince of Wu.