1-Ping an Insurance of China2-Construction Enterprise qualification Certificate3-CQC4-ISO90015-Certificate for Evaluation of Scientific and technological achievements in the Construction Industry7-Environmental Management system Certification8-Electric heater (Wall heating) 3C Certification8-Occupational Health and Safety Management system Certification9-CQC electric heater (graphene wall heating)10-heater 3C Certification11-Sanitary Wenbao 3C Certification12-warm foot pad CQC certification13-CE EMC authentication14-CE authentication15-RoHS authentication