Which university was the National Beijing University of Technology in the 1920s?
1937 The school moved to Xi 'an, and established the National Northwestern Polytechnical University with the Engineering College of Beiyang University. After 1945, the part that stayed in Xi 'an later became Northwestern Polytechnical University (or was transferred to other universities in Northwest China), and the part that moved back to Beijing (maybe there were a few people who stayed in Beijing) and the original school property that could not be moved were merged into Peking University Institute of Engineering.