| [1] | Anthropogenic sulphur dioxide load over China as observed from different satellite sensors Atmospheric Environment,      
                                    2016
 DOI:10.1016/j.atmosenv.2016.09.007
 | 
                            
                                |  |  | 
                        
                            
                                | [2] | Perspectives on Atmospheric Sciences Springer Atmospheric Sciences,      
                                    2017
 DOI:10.1007/978-3-319-35095-0_148
 | 
                            
                                |  |  | 
                        
                            
                                | [3] | Variations and photochemical transformations of atmospheric constituents in North China Atmospheric Environment,      
                                    2018
 DOI:10.1016/j.atmosenv.2018.07.004
 | 
                            
                                |  |  | 
                        
                            
                                | [4] | Physiochemistry characteristics and sources of submicron aerosols at the background area of North China Plain: Implication of air pollution control in heating season Atmospheric Research,      
                                    2021
 DOI:10.1016/j.atmosres.2020.105291
 | 
                            
                                |  |  | 
                        
                            
                                | [5] | Measurement report: Long-term variations in surface NOx and SO2 mixing ratios from 2006 to 2016 at a background site in the Yangtze River Delta region, China Atmospheric Chemistry and Physics,      
                                    2022
 DOI:10.5194/acp-22-1015-2022
 | 
                            
                                |  |  | 
                        
                            
                                | [6] | Measurement report: Variations in surface SO2 and NOx mixing ratios from 2004 to 2016 at a background  site in the North China Plain Atmospheric Chemistry and Physics,      
                                    2022
 DOI:10.5194/acp-22-7071-2022
 | 
                            
                                |  |  |