The co-pilot of China Southern Airlines can be laid off if he fails the exam during his work. According to the relevant regulations of Civil Aviation Administration of China (CAAC), pilots must pass regular flight license examinations to ensure that pilots have the necessary flight skills and knowledge. If the pilot fails to pass the exam, the pilot will be grounded or required to take additional training and exams, or even fired, so the co-pilot of China Southern Airlines can be fired if he fails to pass the exam during his work.