Polytechnic University, of course. Zheng Da prefers comprehensive colleges. The University of Science and Technology is mainly a science and engineering school, second only to the University of Science and Technology of China in Anhui Province. Of course, because Anhui's economy is not very developed, it is not as good as other similar schools, such as Harbin Institute of Technology and Xigong University. In terms of pure engineering, Harbin Institute of Technology is the best, followed by Xigong University, which is strong in engineering and influential in the world.