Chang, Cai, and Ling Jiang. “Analysis of Temporal and Spatial Evolution of Coupling Coordination Between Basic Old-Age Insurance and Economic Development in China”. Frontiers in Science and Engineering 3, no. 12 (December 22, 2023): 18–28. Accessed September 12, 2026. https://bcpublication.org/index.php/FSE/article/view/5812.