Jiang Xue, a student majoring in hotel management, serves food at a restaurant in Tianjin University of Commerce in north China's Tianjin, March 15, 2019. A restaurant used as a practice base for students majoring in hotel management in Tianjin University of Commerce started operation on Friday. About 30 students in different roles provided service for customers following the guidance of foreign teachers.  [Photo/Xinhua]