This topic studies the safety supervision in the construction stage. Class III personnel shall participate in at least 8 hours of continuing education on safety production organized by the competent department of transportation within the validity period of the certificate. Full-time safety management personnel shall receive no less than 40 hours of professional training in safety technology every year. After the special type of work has passed the professional technical training and obtained the post operation certificate, it is still necessary to receive targeted safety training every year for no less than 20 hours.