What do you mean by civil air defense?

College students majoring in civil air defense in National Defense Engineering College of PLA Army Engineering University.

Civil air defense students have no military status, but like military school students, they also implement militarized management and usually wear reserve military uniforms. The main employment direction of students majoring in civil air defense is the establishment and employment system of civil air defense office and civil air defense system, as well as design institutes, construction units and civil air defense equipment manufacturing enterprises with civil air defense qualifications. If you want to further your studies, you can choose to take the postgraduate entrance examination.