Most intermediaries recruit students illegally. In order to avoid economic losses, it is recommended that students directly consult the school you want to enroll in to obtain the registration method. There are several ways to upgrade from college to undergraduate: first, recruit students from college; Second, the adult college entrance examination; Third, the self-study exam will be upgraded to a higher level; Fourthly, network distance education is upgraded to junior college; Fifth, the open education of RTVU has been upgraded to a junior college. Among them, online education has flexible learning methods and is more suitable for in-service students to improve their academic qualifications. At present, the Ministry of Education has approved 68 online education colleges. Candidates can check the enrollment brochures of pilot colleges and universities through the regular websites such as "Sunshine Enrollment Service Platform for Online Education in Colleges and Universities", the website of online education college of pilot colleges and the "China Modern Distance and Continuing Education Network" before the exam.