What do you mean by three lines?

The three first lines refer to: first-class disciplines, first-class majors and first-class universities.

1. First-class discipline: refers to a discipline with high academic influence, good academic reputation and high level in a certain discipline. These subjects have made great achievements in teaching, scientific research and personnel training.

2. First-class major: refers to a major with high teaching level, good academic reputation and high employment rate in a certain professional field. These majors have made great achievements in cultivating high-quality talents and promoting social and economic development.

3. A first-class university refers to a university with strong comprehensive strength, good academic reputation and high teaching quality in a certain region or nationwide. These universities have made great achievements in personnel training, scientific research and social services. The proposal of "Three Frontiers" aims to improve the quality of education and teaching, the level of academic research and cultivate more high-quality talents.