This training is in accordance with the notification requirements of the Municipal Epidemic Prevention and Control Command on Forwarding the Notice on Further Strengthening the Supervision of the Whole Chain of Nucleic Acid Detection in COVID-19 and Forwarding the Notice on Further Strengthening the Quality Management of Nucleic Acid Sampling in COVID-19 by Joint Prevention and Control Mechanism [2022] No.64. All nucleic acid collectors need to be retrained and assessed, and it is required that "they shall not be employed without training, and they shall not be employed if they fail the training". After passing the examination, it will be entered into the national nucleic acid collector management system and a training certificate will be issued.