Liaoning University of Petrochemical Technology, Dalian University for Nationalities, etc. Universities offering ethnic preparatory classes in Liaoning Province include Liaoning University of Petrochemical Technology, Dalian University for Nationalities, Liaoning Institute of Finance and Trade, Liaoning University of Technology, Dalian Institute of Finance and Economics, Shenyang Normal University, Liaoning Normal University, bohai university, Shenyang University and Liaoning University of Science and Technology. Preparatory course, also known as ethnic preparatory course, refers to a teaching unit set up in ethnic colleges or related institutions to recruit minority students to strengthen their basic knowledge study before entering undergraduate courses. Ethnic preparatory class refers to a form of running a school for ethnic minority students who took part in the national unified entrance examination for ordinary colleges and universities in the same year, dropped their scores appropriately and were admitted on the basis of merit, and implemented undergraduate and junior college students' (higher vocational) preparatory education in colleges and universities.