Liao Y, Luo Y, Han X. Hierarchical-Synergistic PDCA Closed-Loop: Construction and Optimization of University Teaching Supervision System—A Case Study of Zhengzhou University. ipt [Internet]. 2025 Mar. 5 [cited 2026 Apr. 2];2(2):103–114. Available from: https://journals.niepublish.com/ipt/article/view/396