In March 2022, the Hainan Academy of Environmental Sciences and the Institute of Atmospheric Physics at the Chinese Academy of Sciences jointly released this research report about how the island province that has already enjoyed highest-level air quality in China can further reduce its air pollution in the next five years. The report was written with the support of Energy Foundation China.

After an analysis of Hainan’s current air quality status and the remaining problems after the 13th Five-Year Plan period of 2016–2020, the report compiles and updates the province’s emission inventories, investigates its air pollution sources, adopts a WRF-CMAQ model, conducts a scenario analysis, and proposes feasible air quality improvement targets and pollutant mitigation strategies for the 14th Five-Year Plan period of 2021–2025. The authors hope the report can provide science-based evidence, as Hainan adopts its provincial five-year plan for environmental protection and action plan for air quality improvement. They also hope it can help lay a foundation for the achievement of the province’s goal of world-class environmental quality by 2035.