Call for Papers for the 9th PKU Graduates Forum of Ageing and Health Organising Committee for the 9th PKU Graduates Student Forum on Ageing and Health CFPs： the 2nd Older Adults-oriented Volunteer and Public Welfare Academic Forum (Beijing, Dec. 7th, 2024) (1st round notice) 第二届老龄志愿与公益服务学术论坛征稿通知（首轮）