What materials should be prepared for security inspection of Huangdao subway?

Safety certificate, health certificate, safety training certificate, etc. Huangdao subway safety management standards show that employees need to prepare safety qualification certificates, health certificates, safety training certificates and other materials before they can take up their posts. Huangdao District, also known as Qingdao West Coast New District, is a municipal district of Qingdao and the ninth national new district in People's Republic of China (PRC).