Students who drop out of school to start a business or return to school after retirement need to change their majors because of their own circumstances. According to the inquiry of official website in Weihai Campus of Harbin Institute of Technology, the requirements for changing majors in Weihai Campus of Harbin Institute of Technology are: students who have dropped out of school or resumed their studies after retirement need to change majors because of their own circumstances, and they have difficulties in studying in the original major or cannot continue their studies because of special circumstances. Students have strong interest and ambition in applying for changing majors, or they can study in the original major for health reasons. Harbin Institute of Technology, referred to as "Harbin Institute of Technology", is a key university directly under the Ministry of Industry and Information Technology of the People's Republic of China.