1. Doctoral students usually refer to full-time doctoral students. The biggest difference between in-service doctoral students and doctoral students is that full-time study is needed, and that in-service doctoral students study part-time.
2. Beijing Normal University, founded in 1902 and located in Beijing, is a national key university directly under the Ministry of Education and jointly built by Beijing, ranking among the "double-class", "985 Project" and "21/Project".
3. Postgraduates are a kind of academic qualifications of higher education and the last stage of academic education in China, which are divided into master's degree and doctor's degree. Graduate students are mainly divided into full-time and part-time students. Full-time and part-time graduate students implement the same examination enrollment policies and training standards, and their academic degree certificates have the same legal status and the same effect.