Zhang Ku, former chief of the Doudian Public Security Checkpoint of the Beijing-Hong Kong-Macao Expressway of the Fangshan District Bureau of the Beijing Municipal Public Security Bureau and political commissar of the Anti-Terrorism, SWAT and Patrol Division of the Fangshan District Bureau, speaks at a group interview in Beijing on May 25, 2023. [Photo by Xu Xiang/China SCIO]