EJU (Examination for Japanese University Education for International Studies) is an entrance examination for international students in Japanese universities, which mainly tests students' Japanese ability and basic academic ability. For China students, EJU is relatively difficult, mainly in the following aspects:

1. Language difficulties: The Japanese part of EJU requires students to have a high level of Japanese, including reading comprehension, listening and writing. This is undoubtedly a great challenge for students whose mother tongue is not Japanese. In addition, EJU English subjects also have certain requirements for English proficiency, requiring students to have strong English reading and writing skills.

2. Subject knowledge: EJU's mathematics subjects mainly test high school mathematics knowledge, including algebra, geometry, probability and so on. Although these knowledge points are involved in domestic high schools, EJU topics are often more flexible, which requires students' thinking ability and problem-solving skills. In addition, EJU's history and geography subjects also involve some knowledge points different from China's education system, which need to be supplemented and consolidated by students in the preparation process.

3. Time pressure: EJU's examination time is relatively short, which requires students' time management ability. Especially when answering subjective questions, how to express your views accurately and completely in a limited time is a great challenge.

4. Competitive pressure: As EJU is an important base for Japanese universities to recruit international students, a large number of China students take exams every year, and the competition is fierce. Therefore, it takes more effort and time to stand out from the numerous candidates and achieve ideal results.