Division of responsibilities between surname and name The director presides over the overall work, while the deputy director is in charge of the Political Department, Post-Security Department, Discipline Inspection Commission (Supervision Office) and Police Supervision Detachment. Deputy director Ma Xuebo is in charge of traffic police, legal system and scientific and technological work, deputy director Liu is in charge of entry and exit and network security work, deputy director Shi Yijun is in charge of economic investigation and criminal investigation work.