With more than 10 proprietary intellectual property rights, and successfully passed the ISO9001:2015 Quality Management System Certification, ISO14001:2015 Environmental Management System certification and GB/T28001-2011 Occupational Health and Safety Management System certification, gB/T27922-2011 national standard"After-sales service evaluation system" five- star after-sales service system cerification, and access to AAA-grade credit certification enterprises.