Chongzuo has no place to review the aerial work permit. The operation certificate for working at heights belongs to the special operation certificate, which is used to engage in special or frequent operations with falling height datum of 2m or above and the possibility of falling. Including erection, demolition and maintenance workers who climb more than 2 meters, and surface cleaning workers of high-rise buildings (structures), then the personnel engaged in the above work must hold aerial work certificates. Review process of aerial work permit: submit the review materials to the training institution three months in advance, and the training institution will submit them to the Safety Supervision Bureau, which will arrange the examination in a unified way. Because of the limited annual review of the Safety Supervision Bureau, students who need to take a second or new exam must submit the information to the training institution in advance.