The Door God of Tang Dynasty Started from Qizhou Death Row Prisoner

"At the end of the Sui Dynasty in Qizhou, Qin Shubao was framed by thieves and was killed if he did not replenish the army's food for three days. In order to wash away the blood on his mother's grave, he went after the food, burned tax rolls, stole into the camp of hundreds of thousands of thieves, and opened the door with flags. Later, he changed four flags, but never sold an old owner. The world scolded him for surrendering, and the people asked him to guard the gate."