Research on the impact of population aging on technological progress 并列题名：Research on the impact of population aging on technological progress Research on the impact of international talent inflow on technological progress in China Research on the impact of population aging on economic development in China Research on the path of automobile industry technological progress 并列题名：Research on the path of automobile industry technological progress research on the impact of e-hailing on the travel industry Study on the impact of population aging on the structure of import and export trade research on the perspective of population aging research on the value logic of Marxism ecological theory