Aid classes, also known as "pilot classes" and "closed classes", are a unique form of higher education self-study exams. Holding aid classes in colleges and universities is an effective way for colleges and universities to meet the growing needs of higher education in various forms and ways, and to promote and guide social aid activities with standardized management and high-quality education. Full-time full-time study lasts for four years. The school trains students according to the overall teaching plan of the professional examination plan. Those who have passed all the course examinations and passed the ideological and moral appraisal will be awarded undergraduate diplomas by universities and provincial education examination institutes, which are recognized by the state and internationally. Those who meet the conditions for degree granting will be awarded a bachelor's degree by colleges and universities, and can directly apply for graduate students.

The name of "aid class" begins with 1998. At that time, the Ministry of Education, in view of the fact that despite the repeated enrollment expansion of colleges and universities, there were still many students who could not reach the college admission score or the self-funded line for various reasons every year, and could not afford the expensive sponsorship fees, thus losing the opportunity to receive higher education. Therefore, a regulation was issued to allow a few colleges and universities to recruit some students below the college admission score to the school and train them into ordinary undergraduates. Students who have passed the four-year study and passed all the exams will also receive a university diploma. Like ordinary undergraduates, this form of running a school adopts full-time training mode, which was originally called "closed class", later called "pilot class" and now referred to as "student-aided class", that is, a form of running a school that uses the faculty, teaching environment and school-running equipment of colleges and universities to implement full-time teaching and standardized management.