Ben juan li tu cong zhong guo lao nian ren kou de xian zhuang chu fa, Ying yong zhong guo 1987 nian 60 sui yi shang lao nian ren kou chou yang diao cha zi liao, An zhao ren kou xue de ji ben gui fan, Dui zhong guo lao nian ren kou zuo chu li lun tong shi jian xiang jie he de yan jiu.