Southwest Jiaotong University and Shanghai University. According to official website of Tianjin University of Commerce, Southwest Jiaotong University and Shanghai University, followed by Zhengzhou University and Hebei University of Technology, are the institutions offering the most international economics and trade majors. Tianjin University of Commerce (TUC), located in Tianjin, is an institution of higher learning that focuses on business, with management, economy, engineering, law, literature, science and art as its multidisciplinary support and coordinated development. It is a key university in Tianjin.