Postgraduates of China Southern Airlines are more difficult to test than 985. China Southern Airlines, namely Nanjing University of Aeronautics and Astronautics, ranks 4th among graduate students in Jiangsu, and the comprehensive strength of graduate schools ranks 62nd. The difficulty of the postgraduate entrance examination of China Southern Airlines mechanical major is affected by the popularity of the major, with a large number of applicants and high difficulty. The difficulty of postgraduate entrance examination ranks first in 2 1 1 university. Nanjing University of Aeronautics and Astronautics is a high-level university in China, one of the "seven sons of national defense", located in Jiangsu. 985 University is the general name of the first-class universities in China. 1on may 4th, 998, the state put forward that "to realize modernization, China should have a first-class university with world-class level." The Ministry of Education decided to focus on supporting domestic universities to establish world-class universities and high-level universities, referred to as the "985 Project", with a total of 39 universities.