Adult universities generally need 2-5.5 years of study time, and adult college entrance examinations have different levels and academic systems. Details are as follows:

1. From high school to undergraduate (referred to as from high school): it is an undergraduate education based on high school education (or equivalent), which is generally set up in ordinary colleges and universities. Educational system: 4 years of science, engineering and medicine, 5.5 years of part-time; Other disciplines are full-time for 4 years and part-time (including amateur and correspondence, the same below) for 5 years.

2. From high school to junior college (referred to as junior college): it is a junior college-level academic education based on high school graduation education (or equivalent). Academic system: science and engineering and medicine are full-time for 3 years and part-time for 4 years; Other disciplines are full-time for 2 years and part-time for 3 years.

3. From junior college to undergraduate (referred to as junior college): it is an undergraduate education based on the national education series with junior college education. Educational system: full-time full-time study is generally 2 years, and part-time study is 3 years.

Supplementary information:

Adult university, that is, adult academic education, also known as "adult formal education", is the general name of systematic primary education, secondary education and higher education for adults. All courses are completed according to the teaching plan stipulated by the state, and those who pass the examination are awarded corresponding academic certificates. Generally through classroom teaching, correspondence learning, radio and television teaching, self-study exams and other forms. Adult academic education is an academic education system established by the state to build a learning society, improve the scientific and cultural quality of the whole people and enhance the comprehensive national strength. It is an important part of the national education system.