Judging from the announcement of adult college entrance examination in many provinces and cities in China, almost all candidates need 18 years old to apply for the exam. In addition to the lower age limit, there is no strict requirement for the upper age limit of candidates. As long as you can successfully complete your studies, you can sign up, and you can't finish your studies because you are too old. In other words, if you want to sign up for the adult college entrance examination, you must be at least 18 years old. Even if the elderly reach retirement age, they can register for the adult college entrance examination normally. If the exam reaches the admission mark, you can go through the admission formalities according to the regulations of the school, complete the teaching tasks arranged by the school, and all of them can graduate smoothly and issue graduation certificates.