Complete all credits. Official website of Beihang University shows that the standard length of study for doctoral students in this school is three years. If you have a doctorate for two years, you should complete all the credits within the specified time. Only after passing the defense can you graduate, and you must publish more than two papers in core journals as the first author. Beijing University of Aeronautics and Astronautics (Beihang University for short) is located in the capital Beijing, directly under the central government and directly under the Ministry of Industry and Information Technology of the People's Republic of China.