Qin H. Do New Gaokao Schemes Increase Students’ Autonomy in Subject Selection: An Empirical Analysis Based on the CatBoost Regression Tree Model. Best Evid Chin Educ [Internet]. 2024 Jul. 25 [cited 2026 Apr. 30];17(2):1872-3. Available from: https://www.bonoi.org/index.php/bece/article/view/1400