Due to the increase in average life expectancy and the decline in fertility, almost all countries are entering an aging society. Developed countries have entered an aging society, and developing countries are moving towards an aging society. In the demographic data structure of developing countries over the next 50 years, the growth rate of the elderly will be four times the growth rate of the total population. China is a developing country with the largest population in the world. This dual feature has made the economic impact of China's population aging more prominent. <<