Report to the local security checkpoint. There are three types of security personnel, thirteen of which need to be declared.

After passing the audit, it will be reported to the security checkpoints of cities, and those who pass the audit will be reported to the Ministry of Construction. The local construction department will organize experts to continue the evaluation, and those who pass will be certified. Unqualified ones should be rectified and reported as soon as possible.

The safety license is extended every three years. Invalid without extension.