2. Empty asterisks represent national key disciplines, triangles represent provincial and ministerial key disciplines, circles represent disciplines and majors that recruit doctoral students at the same time, and solid asterisks represent independently added disciplines and majors.

3. Setting up one's own major is the right given by the state to key disciplines. These majors can't be found in the unified professional catalogue, but the Ministry of Education recognizes them. The more key universities, the more self-established majors.

That's a major set by the school. The self-designed major is a major set up by our school, and all candidates can apply for it. The only problem is that because it is self-designed, it may not be particularly mainstream when it comes to employment, which means it may not be easy to find a corresponding major ... For example, the recruitment subject of the recruiting unit is physical geography, but the "regional environment" major set up by a university may be the same, but people can't help it if they want to be wrong.