the air quality in dongfang city is not the worst in Hainan province. According to public information, the excellent rate of air quality in Dongfang City in 2122 was 97.1%, the concentration of PM2.5 was 11.6 μ g/m3, and the cumulative task balance of PM2.5 was 41 μ g/m3, ranking first in the province. Although the air quality in Dongfang City is not the best in Hainan Province, it is not the worst.