A week. In order to implement the safety inspection of each team, the safety production management personnel of each team must conduct a safety inspection of various equipment and facilities on duty once a week. According to the National Law on Work Safety, safety officers should do a good job in daily supervision, inspection, spot check, training, rectification, prevention, dust removal and cleaning, security inspection, fire prevention, theft prevention, explosion prevention and poisoning prevention, equipment maintenance and management, safety tips, etc. in stations, automobiles, supermarkets, hospitals, schools, enterprises, meeting places, entrances and exits. As a team leader and operator, and hold relevant certificates.