 Then, he persuaded Gao Tansheng to upspring.After that, more and more upspring and rebellions happened all over the country due to the cruel rule of the emperor, corruption of local governments, and the endless war against Goguryeo Koreans and Turks.When the emperor Yang Guang was travelling to Jiangdu (江都), 18 major rebellion forces got together in Siming Mountain, a mountain located just on the emperor's way to Jiangdu, trying to overthrow the emperor and his dynasty.