Excellent grades, English IELTS score between 4.5-6. According to the inquiry of official website of Northwestern Polytechnical University, the requirement of the undergraduate preparatory class of Northwestern Polytechnical University is to apply in person, with excellent grades and an IELTS score of 4.5-6. You can be admitted if you meet the conditions. Northwestern Polytechnical University, referred to as Xigong University or Northwestern Polytechnical University, is directly under the Ministry of Industry and Information Technology of the People's Republic of China. It is a multi-disciplinary research-oriented national key university with the characteristics of personnel training and scientific research development in aviation, aerospace and navigation.