It is difficult for pilots entrusted by China Southern Airlines to graduate from China Civil Aviation Flight Academy, and they need to meet certain conditions before they can graduate. These conditions include: completing the undergraduate study of flight technology major, passing all the required course examinations, meeting the flight qualification standards in English, passing the political examination and physical examination, and signing the working years agreement. Because of the strict graduation requirements, the probability of being brushed off is high, and the elimination rate is 15%.