Haikou: freshest air, lowest house price

People's average life expectancy in the selected cities is 77. In comparison with China's nationwide average of 72, the data is enough to tell us how important the climate is to health.

Among all the selected cities, Haikou has the best climate with 85 percent excellent air quality days every year. The house price in Haikou is also the lowest among these 10 cities.