"In the thirteenth year of Dazhong's reign in the Tang Dynasty, many organizations emerged among the people to fight against the emperor and corrupt officials. Among them, the Feidaomen, under the banner of "killing the rich, helping the poor and overthrowing the imperial court," was the most powerful. The headquarters of Feidaomen is located in Fengtian County, close to the capital Chang'an. In order to ensure the safety of Chang'an, the imperial court ordered Fengtian County Government to exterminate all members of Feidaomen."