You can take the local exam in xi 'an, and the test center must fill in one of these test centers in Xi 'an: (Xi Youshi University, Xi University of Technology, Xi University of Posts and Telecommunications, Shaanxi University of Science and Technology, Northwest A&F University, Xi Engineering University, Xi 'an University of Finance and Economics, Shaanxi University of Technology, Yan 'an University). Other test centers do not accept candidates from other universities! Don't worry, if Beijing Institute of Technology sets its own questions, it will send them to your test center. Don't worry about these, just go to the local Xi 'an test center.