2. Lack of interaction and socialization: Online education is usually self-study, lacking face-to-face interaction and communication, which may make students feel lonely and lack social experience.
3. Lack of supervision and feedback: Online education usually lacks supervision and feedback, and students need to master learning methods and progress independently, which may cause pressure and uncertainty to students.
4. Students don't adapt: Some students may not adapt to online education, they may prefer traditional face-to-face education, or they may need more guidance and support.
5. Lack of practical experience: Some disciplines need practical experience, such as laboratories, workshops, field trips, etc., and online education may not be able to provide it.
6. Lack of accreditation: Online courses usually lack accreditation, which may affect students' employment prospects and academic reputation.