1. The competition is fierce: The Open University of China is an institution of higher learning in China, with high popularity and reputation. Because of its flexible learning style and low tuition, it has attracted many candidates to apply for the exam. Therefore, the competition for postgraduate entrance examination is fierce, and the admission ratio is usually low and difficult.

2. High self-study ability: The National Open University is characterized by distance education, and students need to have strong self-study and self-discipline ability. Compared with the traditional face-to-face postgraduate education, distance education pays more attention to students' autonomous learning and exploration. This requires candidates to have good study habits, information acquisition and processing ability, self-management and time management ability.