Who was the first ruler of the Tang dynasty?
Emperor Gaozu of Tang
In 620, Li Fuwei captured much of the territory of another agrarian ruler, Li Zitong, the Emperor of Wu, in the lower Yangtze River region, in the name of Tang Dynasty. Li Zitong, in turn, defeated and took over the territory of Shen Faxing the Prince of Liang, roughly modern Zhejiang.