1. Tsinghua Peking University Tsinghua Peking University has high academic requirements. Students are required to have good learning ability and study habits, and strong self-study ability. The study ability and study habits of self-taught students are worse than those of ordinary students, which does not meet the academic requirements of Tsinghua Peking University.

2. Self-taught students' learning motivation. Self-taught students are not enthusiastic enough to complete their learning tasks. Tsinghua and Peking University require students to study actively and have strong learning perseverance. Self-taught students lack spirit and can't meet the requirements of the school.

3. Self-taught students' learning ability. Self-taught students have weak learning ability and lack basic learning ability. Ability is the basic requirement for students of Tsinghua Peking University, but the self-taught students do not meet the requirements.

4. Tsinghua Peking University and Tsinghua Peking University have the best employment prospects in China. The school provides high-quality employment opportunities for students, and the employment prospects of self-taught students are not optimistic, which is why Tsinghua and Peking University do not accept self-taught students.