Depends on illness and work. The railway needs some training and inspection to return to work after a long illness. The specific time depends on the illness and job. Generally speaking, railway companies will formulate corresponding plans and training programs for returning to work according to employees' illness and work characteristics, including on-the-job training, safety training and skills training. Return to work inspection includes physical examination and occupational health examination to ensure that the physical condition of employees meets the job requirements. The specific training and return to work time need to be determined according to the actual situation.