                                                                                                                   
                  2020  11  1    
                                                     
                                        
                                                                              10%                                                                                       2019  11   1  2020  10   31        
                                                    
                             
                      PAD                               
                                                                                    
                  2019  10    2020  10                                                                     
          2020  11   12                       
            2020  12    2022  12                                