Principle of energy. Energy principle of re-examination subjects for flight major in Harbin Engineering University. Harbin Engineering University, referred to as "Harbin Project" for short, is a national key university jointly established by the Ministry of Industry and Information Technology, the Ministry of Education, Heilongjiang Province, Harbin City and the Navy, and ranks among the "world-class discipline construction universities" and "2 1 1 engineering". The school's predecessor was the Military Engineering College of China People's Liberation Army (Harbin Military Industry for short), which was founded in 1953.