| Vendor | 
                        Spec | 
                        Unit | 
                        Price | 
                        Currency | 
                        Date | 
                    
                    
                         | 
                        China national standards | 
                        MT | 
                        520.0 | 
                        USD | 
                        20200501 | 
                    
                    
                         | 
                        China national standards | 
                        MT | 
                        520.0 | 
                        USD | 
                        20200501 | 
                    
                    
                         | 
                        China national standards | 
                        MT | 
                        520.0 | 
                        USD | 
                        20200501 | 
                    
                    
                         | 
                        China national standards | 
                        MT | 
                        510.0 | 
                        USD | 
                        20200501 | 
                    
                    
                         | 
                        China national standards | 
                        MT | 
                        3670.0 | 
                        USD | 
                        20200423 | 
                    
                    
                         | 
                        China national standards | 
                        MT | 
                        520.0 | 
                        USD | 
                        20200422 | 
                    
                    
                         | 
                        China national standards | 
                        MT | 
                        3350.0 | 
                        USD | 
                        20200421 | 
                    
                    
                         | 
                        China national standards | 
                        MT | 
                        3560.0 | 
                        USD | 
                        20200421 | 
                    
                    
                         | 
                        China national standards | 
                        MT | 
                        540.0 | 
                        USD | 
                        20200421 | 
                    
                    
                         | 
                        China national standards | 
                        MT | 
                        3660.0 | 
                        USD | 
                        20200420 |