1. Enrollment scope: The self-improvement plan is mainly aimed at students from rural and poor families, aiming at providing these students with more opportunities to receive higher education. The national special plan is set up to train all kinds of special talents in the fields of art, sports, military, science and technology.

2. Enrollment target: The self-improvement plan is mainly aimed at high school graduates, and is selected through comprehensive evaluation and assessment of students' comprehensive quality. The national special plan selects qualified special talents according to the requirements of different fields.

3. Admission method: Self-improvement plans generally adopt a combination of interview and comprehensive evaluation for admission. The national special plan is selected according to the specific project requirements, which may include written test, interview and physical fitness test.

4. Scholarship policy: Students who participate in the self-improvement program can enjoy grants and scholarships to a certain extent. Students enrolled in the national special program will also receive scholarship policies provided by the corresponding projects. It should be noted that the specific admission policies and requirements may vary according to time and policy changes.