Chengdu metro security personnel should be trained for 20-30 days. After passing the interview, they will receive 15-25 days pre-job training at the subway security inspector training center. Accommodation, teaching materials, clothing and bedding are provided free of charge during the training period, and individuals need to bring their own toiletries. After the probation period expires, I voluntarily sign a labor contract for one to two years, and enjoy the treatment of security inspectors from the date of signing the contract.