Beijing Institute of Technology, Nanjing University of Science and Technology, north university of china, changchun university of science and technology, Shenyang Gong Li University, Xi University of Technology, Chongqing University of Technology. Seven Children of Ordnance Industry refer to seven undergraduate colleges directly under the former Ordnance Industry Department, namely: Beijing Institute of Technology, Nanjing University of Science and Technology, north university of china, changchun university of science and technology, Shenyang Gong Li University, Xi University of Technology and Chongqing University of Technology. Among them, Beijing Institute of Technology is a first-class university and Nanjing University of Science and Technology is a first-class discipline. At the same time, these two universities are both "double-class" universities, belonging to "seven national defense schools" and "seven engineering corps". In addition, although the other five universities are all "double non-"institutions, they have their own advantages in discipline development.