Speaker
            Prof.
    Xiang-Yu Wang
            
                (Department of Astronomy, Nanjing University)
        
        
    Primary author
        
            
                
                        Prof.
                    
                
                    
                        Xiang-Yu Wang
                    
                
                
                        (Department of Astronomy, Nanjing University)
                    
            
        
    
        Co-authors
        
            
                
                        Prof.
                    
                
                    
                        Felix Aharonian
                    
                
                
                        (Max-Planck-Institut for Nuclear Physics, Germany)
                    
            
        
            
                
                        Mr
                    
                
                    
                        Ruo-Yu Liu
                    
                
                
                        (Department of Astronomy, Nanjing University)