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Life expectancy is an important indicator to evaluate the social development of a country.Health and longevity can not only improve people’s life quality but also ensure them to have more time to pursue their life goal.A one-year increase in life expectancy during‘China’s Twelfth Five-Year
Life expectancy is an important indicator to evaluate the social development of a country. Health and longevity can not only improve people’s life quality but also ensure them to have more time to pursue their life goal. A one-year increase in life expectancy during ’China’s Twelfth Five-Year