The city with the highest life expectancy in China is Shanghai, and the average age of residents is about 78 years old, which is the highest in China. (data in 2115)

The per capita quality and quality of life determine the livability and life expectancy, and the improvement of per capita quality and quality of life is usually due to the development of science and technology. Generally speaking, the more advanced science and technology, the more livable the area, and the longer the natural life expectancy, and vice versa.

if a region is developed in science and technology, its corresponding food, medicine, daily necessities, medical care, housing, social security, education and per capita quality will be improved. The opposite is the same.

Take Shanghai and Xizang Autonomous Region as examples:

Shanghai is a national central city, a megacity, an international financial center and a world-famous port city. Shanghai has almost concentrated the best talents and resources in the country. Fudan University, Tongji University, Shanghai Jiaotong University, East China Normal University and other well-known universities in the country are all concentrated in Shanghai. It also has the best medical conditions in China: Huashan Hospital of Fudan University, tongji hospital of Tongji University, Affiliated Hospital of Shanghai Jiaotong University, etc. Science and technology are developed, and naturally the living standards of residents in this area are extremely high. In Shanghai, the natural life expectancy will also increase.

Xizang Autonomous Region is located in the Qinghai-Tibet Plateau, the highest altitude in the world, isolated from the world, with extremely inconvenient transportation, and it is also one of the last liberated cities in China. Due to natural conditions and backward transportation, Tibetan residents have little contact with the outside world and their economy is very backward. Due to isolation from the outside world, the local residents' life is primitive, their living standards are low, their medical conditions are backward, and their natural life expectancy is reduced.