CUI, Jiaqi. Analysis of Factors to Improve the Happiness of the Elderly under Aging Trend. Journal of Education, Humanities and Social Sciences, [S. l.], v. 23, p. 447–454, 2023. DOI: 10.54097/ehss.v23i.12932. Disponível em: https://drpress.org/ojs/index.php/EHSS/article/view/12932. Acesso em: 7 aug. 2026.