In order to promote the cross-Straits communication and cooperation continuously, the major tasks of this project include (1) analyzing the effect of 2019 Novel Coronavirus pneumonia on the air quality in China and Taiwan, and the yearly changes in the air quality in China and Taiwan; (2) analyzing the effect of air pollutant emissions in different areas of China on the air quality in Taiwan by means of CMAQ model; (3) collecting the strategies conducted in China to control air pollution and their conducting results, such as the 13th Five-Year Plan and Three-year Action Plan for Winning the Battle for a Blue Sky; (4) analyzing the formation mechanism of ozone and collecting the control strategies conducted in at least three cities at prefecture level or above; (5) collecting the types of air quality models and their principles, the early warning mechanism of heavy air pollution events, and the developments on air pollution control technologies; (6) planning the approach to promote the cross-Straits communication and cooperation and holding two conferences in the field of air quality improvement; and (7) conducting economic benefit analysis of this project. At the moment of finishing this final report, the changing trends of air quality in Taiwan and China during 2015 to 2020 and the effect of 2019 Novel Coronavirus pneumonia on the air quality in Taiwan and China have been analyzed. In addition, the changes in ambient concentrations of air pollutants during public holidays and non-holidays have been analyzed and compared. In order to evaluate the effect of transboundary Air Pollution on the air quality in Taiwan, CMAQ model was applied to analyze the effect of air pollutant emissions from different regions of China on the air quality in Taiwan. Moreover, the air pollution control strategies including the 13th Five-Year Plan and Three-year Action Plan for Winning the Battle for a Blue Sky conducted in Beijing City, Shanghai City, Heifei City and Nanjing City and the conducting results have been analyzed. The formation mechanism of ozone and the control strategies conducted in Hefei City, Tianjin City, Taiyuan City and Shanghai City have been analyzed as well. The air quality prediction process and the emergency prevention measures for heavy air pollution conducted in Taiwan and China, and the available technologies of pollution prevention and control for major sources have also been reviewed and compared. In order to promote the cross-Straits communication and cooperation, the data exchange and QA/QC systems of some international cooperation projects have been collected and some suggestions have been offered. Nevertheless, due to the COVID-19 Pandemic, the relevant works of two conferences have been deleted with approval of EPA. In order to understand the benefits of implementing China’s Action Plan for Air Pollution Prevention and Control, literature relevant to the costs and benefits analysis of the implementation of the action plan have been reviewed and analyzed.

2019 Novel Coronavirus Pneumonia, Air Quality Modelling, 13th Five Year Plan, Three year Action Plan for Winning the Battle for a Blue Sky