What is the qualification level and type of classified information system integration?

The qualification of classified information system integration can be divided into two grades: Grade A and Grade B. The Grade A qualification unit can engage in the business of top secret, classified and classified information system integration nationwide, and the Grade B qualification unit can engage in the business of classified and classified information system integration within the administrative region of the province (autonomous region, city) where it is registered. The business types of classified information system integration mainly include system, system consultation, software development, integrated wiring, security monitoring, shielding room construction, operation and maintenance, data recovery, engineering supervision and so on.