What major does public security science refer to?

Hello, public security science includes the following majors: public security science, investigation science, frontier management, fire investigation, drug control, police dog technology, economic crime investigation, frontier command, fire command, public security science, public security information science, criminology, public security management, criminal psychology, investigation science, reconnaissance technology, criminal investigation, criminal science, criminal technology, technical investigation and economy. Public security information technology, public security audio-visual technology, forensic medicine, foreign-related policing, border security, entry-exit management, fire management, fire command, scientific and technological defense, safety engineering, safety technology, public security, domestic security, public security science, public security management, police management, nuclear, chemical and biological firefighting, pre-trial, trace inspection, document identification, law, chemistry. Public security secretary, public security legal system, safety, traffic management, investigation, security, public security management, information network safety supervision, fire prevention management, forest fire prevention, border inspection, border management, drug control, border defense ship command, border defense communication command, staff service, emergency rescue, criminal science and technology, fire protection engineering, safety prevention engineering, traffic management engineering, ship power management, ship technology, border defense machine.