Undergraduate course refers to the bachelor degree stage, which is the first stage of higher education. It is mainly to cultivate students' basic knowledge and skills and prepare for further studies or employment. Undergraduate courses usually include professional courses and general education courses, and the study time is 3-4 years. Universities generally refer to the stage of higher education, including undergraduate, master and doctor. The content of study in universities is more professional and in-depth, focusing on cultivating students' research ability and innovation ability. University study time is relatively long, generally 3-4 years for undergraduate, 2-3 years for master and 3-5 years for doctor.