Full-time graduate students usually had to stay on campus all day to attend classes and follow their mentors to do projects. This is because the purpose of full-time postgraduate studies is to cultivate the academic research ability and practical ability of graduate students, which requires graduate students to continuously accumulate knowledge and experience in academic learning and practice. Therefore, full-time graduate students were generally not allowed to go out to work during their studies to avoid affecting their learning process. Of course, some majors might allow graduate students to do internships or part-time jobs, but such situations were generally rare.