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NCC-CE certificate
                        
                     
                    
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Wind turbine variable pitch system certification
                        
                     
                    
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Patent for Large Electrical Installation Board Assembly Cart
                        
                     
                    
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Hunan University Doctoral Research Base
                        
                     
                    
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ISO Quality Management System Certification
                        
                     
                    
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Wind turbine master control system authentication and certification
                        
                     
                    
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Patent for pitch control system and propeller retraction device for communication
                        
                     
                    
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Patent for Lead Acid Battery Charging Management System
                        
                     
                    
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PCS-CE certificate