Workshop held in Beijing December 12-13, 2016 for officials and specialists from Beijing Municipal Environmental Protection Bureau, Chinese Environmental Protection Agency and Danish Environmental Protection Agency. Introduction to air quality and integrated models applied in Denmark for air quality assessment, sources apportionment, health impact assessment and external costs, and impact assessment of different policy options for improving air quality with focus on traffic. Aarhus University funded by Danish Environmental Protection Agency via project funding from Danish International Development Agency (DANIDA).