On 1 December 2007， the \"Statement on Joint Implementation of Co-Benefits Study and Demonstration Project\" （hereafier， \"the Statement\"） was signed by the Ministry of Environmental Protection of the People's Republic of China （MEP， Cluna） and the Ministry of the Environment， Japan （MOEJ） （hereafter， \"both Parties\"） at Sino-Japan high-level economic dialogue held in Beijing. On 28 December 2007， the \"Sino-Japan Joint Communique on the Promotion of Cooperation in the Field of Environment and Energy\" was issued by the govemments of Japan and China， in which the third article stated that \"Both Japan and China support the study and demonstration project on the co-benefits between air pollution control and greenhouse gas （GHG） emissions reduction\"， which emphasized the importance of this project. Therefore， Sino-Japan joint implementation of co-benefits study and demonstration project was not only cooperation on environmental protection， but also a priority area for environment and energy cooperation in both countries.
　　In accordance with the Statement， the \"Sino-Japan Joint Study and Demonstration Project on Co-Benefits between Air Pollution Control and GHG Emissions Reduction\" officially commenced in April 2008. And a total of 2 periods ofjoint study and demonstration project were implemented by the end of March 2016. The main purposes of the project were： to implement the \"Statement\" signed by \"both Parties\"， quantitatively assess the effectiveness of the co-benefits between the atmospheric pollutant emissions control and global climate change mitigation in the selected model cities in China within the time frame of the 11th and 12th Five-Year Plan （FYP）； and to use the results as a tool to effectively link domestic environmental protection policies with climate change policies. The main contents of the project include： （1） evaluation of the co-benefits between total pollution control for air pollutants and GHG emissions reduction in the model cities； （2） capacity buiding programs to enhance the skills of the key public and private personnel in the model cities； and （3） technical cooperation， etc.