Tianjin heowns Biochemical Technology Co., Ltd.
                            
                            Telephone400-6387771-6039 18920764717
                            Websitehttp://www.heowns.com
                         
                        
                            
                                Shanghai Haohong Pharmaceutical Co., Ltd.
                            
                            Telephone400-8210725 4008210725
                            Websitehttps://www.leyan.com/
                         
                        
                            
                                Shanghai Maclean Biochemical Technology Co., LTD
                            
                            Telephone021-021-50706066 15221275939
                            Websitehttp://www.macklin.cn/
                         
                        
                            
                                Nanjing Shizhou Biology Technology Co.,Ltd
                            
                            Telephone025-85563444 15850508050
                            Websitehttp://www.synzest.com
                         
                        
                            
                                Jilin Chinese Academy of Sciences-yanshen Technology
                            
                            Telephone 18143011203
                            Websitehttp://www.chemextension.com/
                         
                         
                            
                                Guangdong Wengjiang Chemical Reagent Co.,Ltd.
                            
                            Telephone0751-2815983 13927872582
                            Websitehttp://www.wj-chem.com/
                         
                        
                            
                                Merck KGaA
                            
                            Telephone21-20338288 
                            Websitehttp://www.sigmaaldrich.cn