Because social candidates don't have files, social candidates don't need files and don't have to show them. Only fresh graduates should provide files. College entrance examination enrollment institutions do not restrict social candidates to apply for the exam, and all institutions will allow social candidates to apply for the exam and admit them according to their grades. Social candidates are groups of candidates who are opposite to those who are at school or studying. Some publicly registered exams, such as the national unified entrance examination for colleges and universities and the national unified entrance examination for graduate students, can be taken by other qualified people from all walks of life, such as on-the-job workers, freelancers and retirees.