Abstract:The control strategies for haze in China are not only cutting-edge topics of atmospheric research, but also an urgent issue to be addressed by the Chinese government and the public. Focused on the core scientific issues of the formation, evolution, and control of atmospheric fine particles (PM 2.5 ), this project will carry out a series of laboratory simulations, field observations, and numerical simulations. The research programs aim to determine the composition and sources of pollutants causing haze; to clarify the key physical and chemical mechanisms of regional haze formation in the regions of Beijing-Tianjin-Hebei, Yangtze River Delta, and Pearl River Delta; and to identify the key pollutants and sources of pollution. We will develop atmospheric haze monitoring technology, forecast and early warning, control decision-making models, as well as conduct R & D on source and process control technology for key pollutants that induce haze. Thus, the scientific and practical techniques and policy solutions will be provided to control the haze pollution.