After the death of Emperor Yang of Sui in 618, Du Fuwei initially contended for supremacy of the lower Yangtze River region with fellow rebel leader Li Zitong the Emperor of Wu and the former Sui officials Shen Faxing the Prince of Liang and Chen Leng (), but after he was defeated by Li in 619, he submitted to the Tang dynasty.
After Emperor Yang of Sui's death in 618, Du Fuwei initially vied for control over the lower Yangtze River region with Li Zitong, who ruled as the Emperor of Wu and former Sui officials Shen Faxing, Prince of Liang, and Chen Leng. However, after being defeated by Li in 619, he joined the Tang dynasty.