According to official website, there are 64 colleges and universities in xi 'an, including Northwest University, Xi Jiaotong University, Northwestern Polytechnical University, Xi University of Technology, xidian university, Xi University of Technology, Xi University of Architecture and Technology, Xi Petroleum University, Shaanxi University of Science and Technology, Xi University of Engineering and Chang 'an University, among which 45 are undergraduates, and their specialties are 19.