The first is the improvement of medical conditions. In the past, many diseases could not be overcome because of technical conditions and treatment methods, so many people died at a young age. Now, with the improvement of medical level, we have found many treatments for diseases, so the average life expectancy will be greatly improved. This is due to the medical experts and biologists who have been committed to solving various intractable diseases.

Secondly, people's living standards have generally improved and their health awareness has been continuously improved. In the past, many people did not pay attention to health problems because of economic conditions, so their life expectancy was low. Now many families have got rid of poverty and become rich, so everyone's health is gradually improving. After all, everyone used to have food and clothing problems. Who has the mind to pay attention to whether they live healthily all day, and it is good to fill their stomachs every day.

In addition, the productivity of agriculture, because of the existence of such great figures as Grandpa Yuan Longping, our productivity has improved a lot, and the state has also issued many relevant policies to support agricultural development. Many years ago, our production goal was to feed the people. Now we are gradually pursuing to eat better and healthier, which is the change brought by the progress of the times to our lives.

Finally, because of the popularity of health concept, many young pregnant mothers will go to the hospital for prenatal examination regularly, so the children born are basically healthy, and there are few cases of deformed children. After the child is born, many diseases can be found and treated in advance because of the protection of various vaccines, which greatly reduces the mortality rate.