The cause of a police attack incident which occurred from the afternoon of July 7 to the early morning of July 8 in Bao'an District, Shenzhen has been basically ascertained. According to the Public Security Bureau of Shenzhen, in order to strengthen city management and solve the prominent problem of illegal operation, Shiyang Subdistrict Office of Bao'an District organized an operation to clean up and rectify illegal operation vehicles according to unified arrangements in the morning of July 7. There was a check point near the Shiyang Business Department of China Southern Power Grid on Baoshi East Road in Shiyang Subdistrict. At 9:20 am, Li Guochao (male, 31 years old, from Meizhou of Guangdong, who was found to have no valid driving license) drove a numberless two-wheeled motorcycle with one passenger from west to east and passed through this road section. After seeing this, the inspectors stopped him for checking.